Importance of Canonicalization in Technical SEO

A lot of material on the web is quite similar to other stuff; in fact, estimates put the percentage at 25% to 30%. Serving too much duplicate material isn’t helping search engines like Google serve their visitors well.

For that reason, search engines will only display one of the several versions in search results. By canonicalization in SEO you can notify search engines about the original version. This will help your most essential pages rank higher and increase the crawl budget. 

When there are many versions of a website, you can tell Google which one to display in search results by using the rel=”canonical” HTML element.

Its primary function is to aggregate identical domain names on a private website.

Google will choose one URL and ignore the rest to avoid showing results that include duplicate material. To put it simply, this is the canonical URL.

This article will focus on:

  • The Role of Canonical Tags
  • Addressing Duplicate Content Issues
  • Implementing Canonical Tags
  • Canonicalization and Site Architecture
  • URL Canonicalization Techniques
  • Canonicalization vs 301 Redirects
  • Canonicalization and Link Equity
  • Canonicalization in Mobile SEO
  • Monitoring and Auditing Canonical Tags
  • Future of Canonicalization in SEO

The Role of Canonical Tags

Canonicalization in SEO is a technique used by website administrators to designate one specific URL or web page as the authoritative source for all of their content.

You may notify search engines that one version of the material is more authoritative than any other, and that any changes made to that version are just incremental improvements. Because of this, canonicalization should be a component of your content strategy and site administration. 

You would have no say regarding which URL the search engine displays in relevant results if canonicalization didn’t exist. You inform search engines that a URL with a canonical tag is the original content and should be displayed in search results. While search engines have the option to disregard this canonical tag, it is widely believed that canonicalization is a practical method for handling duplicate material.

Here’s a practical example to help illustrate: You find yourself on an online shoe store’s website, perusing the selection. Sorting the results by price allows you to quickly find shoes within your budget by displaying the priciest alternatives first. While you’re doing this, you’ll see that the page’s URL is changing. Updated from to (thanks, Google).

Could you please tell me whether this is the same page or a new one? On one hand, it seems like the same pageā€”the top shoe-related text block is still there, the header and footer are identical, and the sidebar filter choices are also same. Perhaps the same shoes will appear on the page even in a different sequence.

However, due to the unique URL, search engines like Google see it as an entirely separate page. The result is what search engine optimization experts term “duplicate content”: two pages on this website that contain exactly the same information.

For the owner of the website, this presents a challenge. Google will choose only one page to display in search results since showing both would be less useful to users. If Google selects a different page than the one the website owner wants (or if the owner wants a different page than Google), what then?

Canonization, a lofty term for a simple idea, comes into play here. This is a technique for dealing with duplicate material that lets search engines know which page should be considered the primary or “canonical” version.

With respect to content syndication and republishing across many domains, Google previously advised utilizing the canonical tag.

Canonical tags were revised in May 2023 in Google’s support manual. It currently reads:

Canonical tags are no longer meant to link relevant material across many sites or syndicated information on the broader web; instead, they should only be used to identify preferred URLs inside a single domain.

Some think that the rel=”canonical” element may do more than just inform Google which URL to display in search results. it can also transmit signals for ranking from a particular page to another.To prevent syndication partners from duplicating your work, you should avoid using the canonical link element.

Differences between canonical tags and redirects

To choose the most desired version of a page from a collection of identical or nearly identical pages, developers employ canonical tags. Crawlers from search engines may use this information to better index and display content on search engine results pages.

Canonicalization vs 301 Redirects

To tell visitors and Google and other search engines to go to another URL, you may employ redirects, which are HTTP status codes. The 301 redirect is a way to permanently move the requested resource to a different version of your site.

Canonical tags are often used for websites that utilise UTM parameters, for items that fall into more than one category, and for dynamic URLs that are created dynamically.

When transferring a website’s URLs to a different domain, 301 redirects are often used. Additionally, you may use them to reroute people to an alternative page after a deleted one. When your website has many URLs but you only want people to see it via one of them, a 301 redirect is a lifesaver.

A 301 redirect will immediately send visitors to the new URL, even while canonical tags make both sites accessible. While 301 redirects are configured on the server side, canonical tags are inserted in the <head> section. Canonical tags also condense link juice to the chosen URL, but 301 redirects convey to the search engines that the modification is permanent and send all of the SEO value toward the new URL.

301 redirect or canonical tag?

Canonical tags and redirects both tell search engines which versions of a website to index and display on Google search ranking . but they serve different purposes.

The redirect tells search engines to permanently change the URL structure of a website from one URL to another. We recommend using canonical tags. What this implies is that they provide a suggestion as to whatever version of the website should appear on search engine results pages. However,  Google may simply ignore this command.

Assume that Pages A and B are quite similar. Both have almost the same material. You choose to make Page A the preferable version and add a canonical tag to Page B to indicate this. 

Still, Google sees that your sitemap includes Page B. More internal connections are heading to it, as well as more backlinks and better interaction. Page B might still get more Google attention in this scenario, despite what your canonical tag says.

With 301 redirects, this does not occur. Search engine crawlers permanently delete the redirected page in the index and transfer the link equity they have accumulated to the newly moved page after obtaining the redirect signal. 

Addressing Duplicate Content Issues

Duplicate content in SEO refers to the same or similar material on several web pages, either inside or across websites. Search engines work hard to provide visitors with varied and relevant results. but duplicate information may make that goal more difficult to achieve. When search engines find duplicate information, they must select which version to show, which may dilute rankings and confuse consumers.

If a website has duplicate material, its search engine optimization (SEO) performance could suffer. Search engines could have trouble prioritizing results when they discover several pages with identical material. This might cause the search engine to provide results for only one version, while other versions go unnoticed. This may lower the site’s organic rating, which in turn lowers traffic and reduces its presence in SERPs.

How do you handle duplicate content in SEO?

Search engine optimisation (SEO) specialists and webmasters have a potent weapon in the canonical tag to combat duplicate content. In this essay, we will go more into canonical tags.

How canonicalization helps in managing duplicate content

When used properly, canonical tags may greatly enhance a website’s efficiency and provide several benefits in the field of Search Engine Optimisation (SEO). Among the many benefits of Canonical Tags are the following:

Enhanced Visibility in Search Results

With Canonical Tags, you can tell search engines the version of your information is the best and most authoritative by specifying it. Whenever search engines come across duplicate material, they merge ranking signals and attribute equity to the version that has been designated as the canonical one. This merging improves the canonical page’s chances of rising in search engine rankings, which boosts its visibility and organic traffic.

Ranking Signals and Link Equity Consolidation

Multiple versions of a website disperse inbound links and ranking signals. By channeling these signals into the canonical version, canonical tags increase search engines’ confidence in it. To boost the favored page’s SEO worth, it’s helpful to link equity consolidation

Improving the User Experience

By using canonical tags, you can guarantee that people will see the most up-to-date and reliable version of a website. Reduced duplication and improved user satisfaction are the outcomes that users will get when they search for information thanks to the preferred version. As a result, conversion rates, engagement, and bounce rates may all go up.

Keeping Problems With Duplicate Content at Bay

Search engines might get confused when they see duplicate material, which can lead to poor rankings, inefficient indexing, and wasted crawl costs. Assuring that search engines comprehend the connection between various content versions and give preference to the canonical version, canonical tags assist in efficiently addressing duplicate content concerns.

Controlling URLs that change and have parameters

There are a lot of websites that use dynamic URLs. This allows users to provide different parameters and produce different copies of the same information. By designating the canonical URL, you may manage parameter changes and dynamic content, aid search engines in locating the preferable version, and prevent duplicate content issues using canonical tags.

Keep Your Backlinks Worth More

Negative effects on link popularity and search engine optimization might occur when other websites connect to duplicate material. Canonical tags allow you to boost the canonical version’s link profile by directing incoming link value to it.

Enhanced Content Syndication

With Canonical Tags, websites may show where their content came from when syndicated to other platforms or partners. This keeps the original material from being outranked by syndicated versions.

Efficiently Managing Pages

If your site has pagination problems, you may fix them by using canonical tags. These tags tell search engines how each page in your site relates to the primary content. This may consolidate their SEO worth onto the primary text while preventing duplicate content concerns on paginated pages.

Implementing Canonical Tags

Let’s walk through how to add canonical tags to your websites.

Initial Step: Locate Content That Is Similar to or Duplicate

The first step in using canonical tags is to find all of the material that is same or very similar on your website. Some examples of this are many versions of the same site or URLs that use query parameters to access the same content. To identify such cases, do a comprehensive analysis of your website.

Step 2: Select the Version You Prefer

Finding the desired version of the page follows the detection of duplicate or related material. You should aim for search engines to index and rank your preferred version. When deciding which version is best, keep usability, relevancy, and content quality in mind.

Step 3: Place the Canonical Descriptor

Once the preferable version has been determined, the canonical tag should be included in the HTML code of any other sites that are duplicates or identical. Positioned inside the <head> element of your HTML code, the canonical tag notifies search engines of the URL of the recommended version.

Make use of this structure: HTML codeCopy <link rel=”canonical”href= “” You should use the canonical page’s URL instead of

Stage 4: Check and Double-Check

Testing and verifying the functioning of the canonical tags is vital to guarantee their accurate implementation. Several approaches are at your disposal for this purpose:

a) Checking by Hand: Locate and double-check the canonical tag in the HTML code of the identical or duplicated sites.

b) get and Display: Make use of webmaster tools like Google Search Console to get and display the sites that have canonical tags. This makes it more likely that search engines will properly understand the tags.

c) Indexing Status: Keep an eye on the preferred versions and the duplicate pages’ indexing status using the tools provided by the search panel. Make that their indexing patterns are consistent and free of inconsistencies.

Stage 5: Keep an Eye on Things and Make Any Necessary Updates

After adding the canonical tags, you should check how your site is doing and fix it if needed. To make sure you get what you want, monitor things like rankings in search engines, traffic, and indexing behaviors. In addition, you should implement canonical tags as necessary and monitor your website for new occurrences of duplicate or identical material.

Common mistakes to avoid

Technical SEO includes canonical tags, which are within your full control but may be tricky to work with in certain cases. Incorrect canonicalization may cause search engine display problems and, unsurprisingly, poorer ranks. The worst thing is that mistakes may go unrecognized for a long period.

  • Rel = canonical & Mobile Versions

People sometimes make the mistake of using a canonical tag to reference their own mobile URL variations. The right approach is to use a canonical tag that redirects traffic from mobile to desktop and a rel-alternate tag that reverses the direction of traffic from desktop to mobile.

  • Customizing the Canonical Tag to Include Superfluous Information

Resolving problems with duplicate material is the primary goal of the canonical tag. Use it with caution if you want to use it to rank individual web pages for various keywords; it will underperform. Google will find a way to beat you.

You may canonicalize one version of an article or piece of content if you believe there are two very comparable ones. For instance, “The history of laptops” and “How Laptops Came to Life”. However, it’s usually a good idea to redirect the less reliable version towards the better one. You may even merge them into one powerful URL.

  • Establishing canonical chains

If you want to use the href property to link to a certain page, make sure it doesn’t include a canonical tag directing to the same page or another one.

Assume for the moment that is the URL of the web page you want to canonicalize. 

Here is the URL you want to make canonical: 

So, the canonical elements already included:

<link rel=”canonical” href=”” />

Because it generates a canonical chain, this usage of canonical is flawed.

Search engines are likely to view the final page in this chain,, to be canonical. Stick to designating a single canonical page if you value search engine optimization.

  • Non-canonicalized URLs in internal links

Search engines will have an easier time crawling your site if all of your internal links go to the main version. At times, Googlebot may index the invalid URL version if linked to your non-canonical site, notwithstanding your canonical tag. 

  • Relying on hreflang rather than canonical

“Canonical” tags instruct Google to index just one specific version of a page. To remind search engines to index all versions of a website, hreflang tags let them know that the same page exists in many formats. The reason for this is because their target audience consists of individuals from many locations and/or languages.

This error may cause indexing problems, inappropriate language/regional targeting, and search bot misunderstanding.

  • Making use of the “noindex” tag, restricting the web page by editing the robots.txt file, and making use of the canonical tag

It is not recommended to utilize canonical tags in conjunction with the “noindex” tag or robots.txt prohibit. Using all of these properties at once sends conflicting signals to Google since they all have distinct functions. 

As a result, you’re effectively contradicting Google’s ranking of the two web pages by using one feature to indicate one is more essential than the other. On the other hand, you may urge Google to give other sites more weight while hiding the page with the noindex tag.

Canonicalization and Site Architecture

he way your site is structured affects how visitors and search engine crawlers traverse it and locate the material that meets their requirements. Poorly structured sites make it hard for visitors to discover relevant material and may even cause search engine crawlers to overlook certain pages. 

While building your site, you may use a variety of tactics and best practices to highlight your core content and improve your search engine results. Canonicalization is the process of designating certain material as main and instructing Google to ignore or downplay other types of content.

By using canonicalization, site owners may protect themselves from penalties that might result from producing duplicate material. Google can correctly index your site without negatively impacting the user experience if you tell it to disregard some material and focus on other pages.

Best practices for large websites and e-commerce platforms

Having established canonical tags’ significance, we may go on to discuss their efficient usage. Keep your e-commerce website strong and focused on users by following these practical guidelines and best practices:

Carefully Select Your Canonical URLs

Before doing anything else, choose which URLs will serve as the canonical versions. The best product pages are the ones that are both detailed and easy to use. 

If a product page is available via both the “New Arrivals” and the “Best Sellers” categories, you may want to make the “Best Sellers” URL the canonical one as it’s more likely to be useful to users over time.

Maintain coherence

Do not stray from your selected canonical URLs after you have made them. Whether you’re creating a sitemap or just using these URLs for internal links, be consistent.

Take note that any internal links referring to this product should use the canonical URL you’ve selected, rather than the ‘New Arrivals’ version.

Avoid Canonical Chains

In a canonical chain, the canonical version of Page A is referenced by Page B, which in turn references Page C, and the process continues thereafter. This seems like an endless round of tags.

All pages should instead lead readers straight to the definitive, authoritative version.

If, for some reason, tracking settings cause you to possess multiple URLs for a single product, you should not have URL A pointing to URL B and URL B pointing to URL Canonicalization. The correct syntax would be for URLs A and B to both go to URL C.

Employ absolute URLs

According to Google’s John Mueller, when you define your canonical tags, be sure to include the whole URL, which includes http:// /  https:// element. This eliminates any possibility of misunderstanding.


Google Search Advocate John Mueller recommends self-referential canonical since it gives the search engine a crystal clear idea of the page you want indexed and the correct URL to utilize for indexing.

Sometimes, even if you just have one page, there are other URL variants that can still access it. Take parameters as an example; they may be of any case, including uppercase and lowercase, www and non-www, and so on. A rel canonical tag may help tidy up all of these things.

Keep in mind that canonical tags aren’t an all-inclusive solution. They are a resource for improving your site’s visibility in search engine results. Making good use of them will lead to an eCommerce site that is easier for search engines to index and rank.

URL Canonicalization Techniques

Examples of Effective URL Canonicalization:

website vs. non-www:

Choose between canonicalizing to www and non-www and using 301 redirects. To illustrate:




Perform 301 redirects and canonicalize to the secure version. To illustrate:

Canonical: the URL for the page on

This is a redirect, not a link. The URL for the page on

Sorting Query Strings:

Make sure that the ordering of query parameters remains constant. To illustrate:

Canonical: At the URL:

This page is non-canonical:

Canonical Tags:

Implement canonical tags into the HTML head element. An example would be:

<link rel=”canonical” href=”” />

To prevent duplicate content problems, consolidate ranking signals, and let search engines realize which version of your URLs is preferable, you may use these URL canonicalization approaches.

Canonicalization and Link Equity

The concept of link equity, sometimes known as “link juice,” refers to the notion that authority and reputation are shared when one website connects to another, hence increasing the SEO value of both sites. For the sake of clarity: To construct a broad and relevant backlink profile, which in turn improves a site’s reputation, search engine optimizers employ this function to connect high authority, contextual connections from reliable, established domains.

Both inbound and outbound connections contribute to link equity. The quality of backlinks is often evaluated by looking at link-building factors including page strength, topic relevance, and anchor text. Google also uses links and a plethora of other ranking indicators to decide where results appear in search results.

How canonicalization affects link equity and authority

In search engine optimization, link equity is a key consideration. Link equity is not a factor that search engines use when deciding a page’s ranking or where it appears in SERPs. You may use it to learn about and track how well your site is doing in search engine rankings.

While link equity may seem to be nothing more than a vanity statistic, it really incorporates a number of criteria; hence, you can track your progress toward improving these metrics and compare them to your site’s total rankings to determine the impact.

Making high-quality content, taking part in link exchanges, acquiring connections from authoritative websites, and improving internal links are all ways to boost link equity. Search engine optimization (SEO) experts may boost their exposure and search engine ranks by building link equity.

Links inside a page may also aid in building link equity by transferring value from one location to another. Search engine optimization (SEO) specialists may raise their website’s visibility in search engine results pages (SERPs) by learning about link equity and how to boost it.

Strategies for preserving link equity with canonical tags

Choosing which page should be considered canonical isn’t always best accomplished using the canonical tag. One example is the 301 redirect, which Google suggests utilizing instead of a duplicate page when deprecating it.

For users, the main distinction between the two is that with a 301 redirect, they will never view the original page they were attempting to access. For example, if they clicked on a color-specific product URL, the canonical tag will redirect them to that URL regardless of whether it’s canonical or not.

How are 301 redirects distinct from the others? A 301 redirect, as contrast to a 302 or 307 redirect, informs search engines that the page in issue has been relocated permanently. A 302 or 307 redirect, on the other hand, means that the page is temporarily located under a different domain.

When a page uses a 301 redirect, almost all of its link equity (about 95 percent) goes to the new page.

Maintaining link equity in this manner may have a substantial influence on a site’s authority and search engine results. Redirects (302, 307) and others are no longer punished explicitly, but it still takes Google a while to figure out that the redirect is permanent and start giving link equity as a result.

It is also possible to use 301 redirects in lieu of 404 pages when the situation calls for it. Take a 301 redirect as an example: it points to a non-existent website about bespoke shoes that used to get a lot of traffic but is now completely dead.

By rerouting traffic to an up-to-date website for personalized apparel, you can be certain that Google will index the right page. Be careful to direct them to the most appropriate alternate website at all times.

For an improved user experience, think about implementing bespoke 404 pages if you determine that a 404 page is more suitable (for example, for a URL that never worked or had little traffic).

Canonicalization in Mobile SEO

If your website consistently performs badly in search engine results, you need to improve the search performance in today’s mobile-driven environment. Mobile-first indexing is a must in this case.

Website owners should prioritize developing a mobile-responsive design to accommodate Mobile-First Indexing. Because slow-loading sites may discourage mobile visitors and impact search engine results, mobile performance optimization is equally vital. Website owners should also think about the technical parts of mobile-first indexing, such making sure the content is consistently available on mobile and desktop versions, using redirects correctly, and using canonical tagging.

Handling canonicalization in responsive and adaptive designs

By using responsive and adaptable design principles, websites may be made to work seamlessly across a wide range of devices, from desktop computers to tablets and smartphones. The key to successful mobile SEO with canonicalization is making sure search engines can tell the difference between your content versions. These are a few rules of thumb:

Mobile Responsive Design

To improve search performance using Mobile-First Indexing, Mobile Responsive Design is essential. Responsive websites allow their design, content, and functionality to change without breaking a sweat, especially when viewed on smaller screens like smartphones and tablets.

One aspect of mobile responsive design is the use of CSS media queries, flexible images, and fluid grid layouts to make the site adapt to different screen sizes and resolutions. Doing so guarantees that the website displays and functions correctly across a wide range of mobile devices as well as desktop computers and other bigger displays.

Accessible URLs on Any Device:

Make sure that the structure of the URL remains the same on all devices. Because of this, search engines can better grasp the interdependencies across versions.

One approach is to keep the URL the same across all devices and platforms, and then use CSS media queries to dynamically change the layout according to screen size.

Apply canonical tagging:

To specify which version is preferred, you may add a canonical tag to the HTML header. This comes in handy when dealing with dynamic serving or distinct mobile URLs (like

Try to avoid mobile-only URLs

Although and other mobile-only URLs were popular in the past, Google now favors responsive design. To ensure correct canonicalization, utilize different URLs for mobile.

Hreflang for Sites with Multiple Languages and Regions:

If your site provides material in more than one language or area, you may help search engines understand the connections between the various versions by using hreflang annotations and canonical tags.

Pagemap for Mobile Devices

Make sure your XML sitemap includes mobile URLs. This may improve the efficiency with which search engines index and index your mobile material.

Search Console for Monitoring

If you notice any problems with crawl failures, canonicalization, or mobile content, be sure to check Google Search Console often.

Ensuring Accuracy

To make sure your mobile sites are being displayed properly and that canonicalization is configured correctly, use Google’s Mobile-Friendly Test tool.

Monitoring and Auditing Canonical Tags

Achieving success in search engine optimization requires regularly auditing canonical tags. Before you index and crawl a page, you should verify that it contains a canonical tag and that it goes to the right location.

Examining the page’s source code is the simplest approach to audit canonical tags. Choose “view source” from the context menu or, on Chrome, use the “developer tools” button. Your source code should now be accessible. Check for the presence of a rel=”canonical” tag in the <head></head> section.

Another free and easy SEO toolbar from Moz can reveal if a page has a canonical tag.

Alternatively, you might do mass audits of pages using your SEO tools. You may audit your website for canonicalization errors with the use of many tools such as- 

  • Google Search Console
  • Screaming Frog SEO Spider
  • Sitebulb
  • SEMrush
  • Moz Pro
  • Ahrefs
  • DeepCrawl
  • Yoast SEO (WordPress Plugin)
  • Ryte (formerly
  • Varvy SEO Tool

Regular Auditing Practices For Canonicalization

For best SEO results, it’s important to evaluate your canonical tags for a variety of things. Consider this checklist:

  • Source view: Identify Canonical tags from the HTML source code. You can get the source code for a page in most browsers by right-clicking on it or by typing it into the URL bar.
  • Examine the Structure of URLs: You should check for differences in your website’s URL structure that might cause duplicate content difficulties. Common problems include parameter differences, trailing slashes, and uppercase vs. lowercase characters.
  • Criteria for URLs: Make sure that URL parameters are regularly used. And ensure that extraneous parameters are eliminated if your website makes use of them. 
  • Check for Redirects:Check to see that redirects are working right. 
  • Examine Internal Links: Maintain a consistent practice of directing internal links to the canonical version of each page. This includes links in the footer, sitemaps, and navigation menus.
  • Maintaining Reliability on Interactive Websites: If your website makes use of dynamic content, ensure that canonical tags are set up dynamically according to the current URL.
  • Canonical Tags and Pagination: You may show the connection between pages with paginated information by using the rel=”prev” and rel=”next” elements. Additionally, make sure that the canonical tags are correctly set for text that is paginated.
  • Using HTTP Header: Be sure to look in the request headers for the Link header that has the rel=”canonical” property.
  • Robots.txt File: Find out whether the robots.txt file prevents vital sites or canonical URLs from being accessed by reviewing it.

Future of Canonicalization in SEO

Best practices for search engine optimization are more important than ever before due to the rapid rate of change in the digital marketing environment. One such strategy that is often disregarded by both marketers and webmasters is the implementation of canonical tags. Ignoring this seemingly insignificant aspect of search engine optimization might have far-reaching consequences by 2024. With canonical tags, also known as rel=”canonical” links, webmasters may make it very obvious to search engines which version of a website they want to index and show in search results. In the absence of these tags, website owners run the danger of encountering several problems that might diminish their exposure and online presence.

Emerging trends and future outlook

Lack of canonical tags might lead to a disjointed user experience. Users will anticipate an uninterrupted online experience more than ever before by 2024, and they will be more likely to leave a site if they encounter any confusion while viewing its material. Particularly problematic for e-commerce sites is the possibility of consumer misunderstanding and missed purchases due to improper canonicalization of product pages. Proper canonicalization, which ensures clarity and consistency, will be an essential part of any SEO strategy in this day of intense online competition and short user patience.

How to stay updated with SEO best practices regarding canonicalization

It is essential to keep yourself informed about canonicalization and other SEO best practices if you want your website to remain productive. To keep yourself updated, consider the following:

  • If you want to stay up-to-date on SEO best practices, you should follow prominent websites and blogs.
  • Join emails given out by trustworthy SEO resources. 
  • On social media sites like Facebook, LinkedIn, and Twitter, many SEO specialists provide helpful updates and insights. You can keep up with the newest developments in the SEO field by following prominent figures, experts, and organizations.
  • Participate in online groups and forums where search engine optimization experts share advice and tools. 
  • Stay up-to-date on all the latest canonicalization and SEO news by subscribing to Google Alerts.


To improve the user experience, consolidate link equity, and manage duplicate content, you need to maintain canonicalization in SEO. It lets users direct search engines to a page’s main version, which is essential for search engine optimization. Optimizing a website and its on-page SEO relies heavily on canonical tags.

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