A Guide to Detecting and Fixing Canonical Issues in SEO

Updated: February 24, 2024


 This guide demystifies canonicalization. It provides a clear roadmap for detecting and fixing canonical issues. Here, we will provide the information and tools to recognize, address, and avoid canonical issues.

In the digital search engine optimization (SEO) world, it’s critical to understand and address canonical issues. It’s essential for any website aiming to boost its online presence.  

Canonicalization is a technical aspect of SEO. It is vital in how search engines index and display web pages. You can manage a blog, an online store, or a business website. Knowing the details of canonical tags and how to use them will ensure your SEO strategy is vital. We’ll explore every aspect you need to understand about canonicalization. We’ll cover the fundamentals and more advanced strategy.

Canonical issues

 Let’s embark on a journey to master the art of canonicalization. This will enhance your website’s SEO performance.

Table of Content
  1. What Is Canonicalization? How Does It Work?
    1. Purpose of Canonical issue fixing code
  2. How to Fix Canonical URLs in WordPress?
    1. Identify Duplicate Content.
    2. How to Solve Canonical Issues in SEO to Boost Traffic and Authority?
    3. Understanding and Boosting Traffic with Canonical Tags
    4. Enhancing User Experience,
    5. Preventing Content Duplication
    6. Authority Building Through Canonicalization
  3. How Does the Canonical Tag Help You Control Duplicate Content?
    1. Clarifying Preferred URLs
    2. Consolidating Page Strength
    3. Managing Syndicated Content
    4. Solving E-Commerce Challenges
    5. Preventing Indexation Issues
    6. Improving SEO Analytics
  4. Identifying Canonical Issues and Resolving Them
    1. Use SEO Audit Tools
    2. Check for Duplicate Content
    3. Analyze Google Search Console
    4. Manual Checks
  5. Resolving Canonical Issues
    1. Implement Correct Canonical Tags
    2. Resolve Conflicting Signals
    3. Consolidate Similar Content
    4. Update Sitemaps:
    5. Redirect Duplicate Pages
  6. Ongoing Monitoring and Testing
    1. Regular Audits
    2. Monitor Traffic and Rankings
    3. Testing Changes
    4. Track Canonical Tag Changes
    5. A/B Testing
    6. Keep Up with Algorithm Updates
  7. What Is the Rel=Canonical Tag?
    1. Definition
    2. Purpose
    3. Functionality
  8. How to Rel=Conquer the Rel=Canonical Tag?
    1. Correct Implementation
    2. Avoid Conflicts
    3. Use in Cross-Domain Content
    4. Regular Audits
    5. Handle Pagination Carefully
    6. Integration with Other SEO Practices
    7. Definition and Function
    8. URL Forwarding
  9. Importance in SEO and Website Management
    1. Preserving Search Rankings
    2. Avoiding Broken Links
    3. URL Changes
    4. Consolidating Duplicate Content
  10. Technical Implementation
    1. Impact on User Experience
  11. Conclusion

What Is Canonicalization? How Does It Work?

Canonical issues occur when search engines find numerous web addresses. These addresses lead to the same or similar content on a website. This error makes it hard for search engines to decide which page is more important. If you handle this correctly, it can strengthen your website’s SEO efforts. It affects how well your site appears in search results and how visible it is online.

In SEO, canonicalization involves choosing the best URL when there are multiple options. Websites with duplicate or similar content must spread across various URLs. It is essential.

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Purpose of Canonical issue fixing code

It helps search engines identify the ‘master’ or preferred URL version. This prevents them from treating similar pages as duplicate content. The process involves using the canonical tag (rel=canonical). The tag is placed in the HTML header of a webpage.

How to Fix Canonical URLs in WordPress?

Identify Duplicate Content.

Use tools like Yoast SEO or Google Search Console. Locate duplicate pages.

In WordPress, you can establish the preferred URL through the Yoast SEO plugin or the page editor.

You can use plugins to designate canonical URLs for your posts automatically through pages and categories. For example, the ‘All in One SEO Pack’ provides this functionality.

 How to Solve Canonical Issues in SEO to Boost Traffic and Authority?

In the realm of SEO, the canonical tag is a powerful tool often underestimated. Its proper use can significantly boost a website’s traffic and authority. Here, we will explain how unlocking the potential of the canonical tag to improve your website’s performance.

Understanding and Boosting Traffic with Canonical Tags

Link equity can be diluted when multiple pages have similar content as external sites link to various versions. This is known as consolidating link signals. Using canonical tags, you guide all link equity to a single URL. This strengthens its authority and enhances its potential to rank higher.

Enhancing User Experience,

 Canonical tags contribute to a more streamlined user experience. Search engines reduce user confusion. They increase engagement. This indirectly boosts SEO. It directs users to the most relevant and authoritative page.

Preventing Content Duplication

 Content intentionally duplicated across different URLs triggers a canonical tag. This happens with printable pages or mobile and desktop versions. The tag signals search engines about the preferred version. This clarity helps maintain the site’s credibility and authority.

Authority Building Through Canonicalization

A self-referencing canonical tag is wise, even without duplicate content. A self-referencing canonical tag identifies a page as the canonical version. This approach safeguards against URL parameter issues. It ensures link equity is accurately assigned to the page.

Employing cross-domain canonicals is helpful for websites with comparable content spread across domains. For example, an e-commerce site can benefit from this approach. It has multiple country-specific versions. This strategy consolidates the authority of similar pages across various domains. It centralizes their SEO value.

Best Practices
  • Verify that the canonical tag is accurately positioned in the <head> section of the HTML. 
  • Confirm that the specified URL is the full form of the URL (the complete web address).
  • Consistency is key. Ensure that the content of the canonical page closely aligns with the content of duplicates. Increased discrepancies may result in search engines overlooking the canonical tag.
  • Perform regular site audits to guarantee that canonical tags are current. They should reflect the site’s existing structure and content strategy.
  • By leveraging the capabilities of the canonical tag, you can guide search engines more effectively. It ensures they recognize and prioritize your most critical content.

 This strategic approach enhances your site’s SEO. It also strengthens its authority and relevance in the digital space.

How Does the Canonical Tag Help You Control Duplicate Content?

In the intricate SEO landscape, managing duplicate content poses a significant challenge. You can effectively address this challenge using the canonical tag. This tag directs search engines to recognize and index the preferred version of similar or duplicate content. Here’s how the canonical tag becomes a crucial tool in controlling identical content on your website:

canonical issues

Clarifying Preferred URLs

  • The canonical tag’s primary function is to identify a web page’s original version when multiple versions exist. For example, if you have different URLs for articles or product pages due to tracking parameters, the canonical tag signals which version should be preferred as the source to search engines. This prevents search engines from treating these pages as separate, duplicate content.

Consolidating Page Strength

  • Having duplicate content on your website can weaken your pages. Each version of the same page might get backlinks and authority, spreading the SEO value thinly. But with the canonical tag’s help, you can combine these SEO signals and direct them to one powerful and authoritative page. This method boosts the page’s speed and visibility and ranks higher in search engine results.

Managing Syndicated Content

The canonical tag is crucial for websites that share content on different platforms. Some republish their content elsewhere. When you use a canonical tag that points to your site’s original content, you tell search engines that the published content is just a copy. The primary source is on your site. This guarantees that the original content keeps its SEO value. It is visible from versions published on other platforms.

Solving E-Commerce Challenges

E-commerce websites frequently encounter duplicate content challenges, especially with product listings. Products may be featured in various categories, each having its URL. A canonical tag can bring these URLs back to one primary product page. This solution addresses duplicate content concerns. It also enhances the user experience by guiding customers to the primary product page. There, they can find all the information and reviews in one place.

 Preventing Indexation Issues

Search engines might index multiple versions of the same content without canonical tags. This can lead to a disorganized index and potential ranking problems. Canonical tags guide search engines on which pages to index, ensuring a cleaner and more efficient index. This streamlined indexing process helps search engines process your site more effectively. It positively influences your site’s overall SEO performance.

Improving SEO Analytics

Minimizing duplicate content through canonical tags can lead to more accurate SEO analytics. It can also provide better insights. Using canonical tags eliminates the confusion of tracking multiple URLs for the same content. This ensures that data, such as page views, conversion rates, and user behaviour metrics, is correctly attributed to the intended URL. This clarity is crucial for informed decision-making. It is also essential for the practical refinement of your SEO strategy.

Identifying Canonical Issues and Resolving Them

Identifying and resolving canonical issues is crucial. It maintains the health and effectiveness of your website’s SEO. Here’s a systematic approach to identifying and resolving these issues

Use SEO Audit Tools

Use tools like SEMrush, Ahrefs, or Moz to crawl your website and identify canonical issues. These tools can pinpoint pages with missing or multiple canonical tags. They can also identify pages with canonical tags pointing to non-preferred URLs.

Check for Duplicate Content

Utilize tools like Copyscape to identify duplicate content across your website. Pages with the same content but needing proper canonical tags are a potential issue.

Analyze Google Search Console

Examine the ‘Coverage’ report in Google Search Console. This report can highlight pages with duplicate URLs. They were submitted but not selected as canonical. It indicates potential canonical problems.

Manual Checks

Inspecting the canonical tags in the page source can be effective for smaller websites. Look for inconsistencies or incorrect implementations that may be causing issues.

Resolving Canonical Issues

Implement Correct Canonical Tags

Ensure each page has a canonical tag pointing to the original URL. Correct any incorrect or missing tags.

Resolve Conflicting Signals

If different pages have canonical tags pointing to each other, designate one as the authoritative version. This will resolve conflicts.

Consolidate Similar Content

Consider consolidating multiple pages with similar content into one comprehensive page. Use a single canonical URL for it.

Update Sitemaps:

Ensure your XML sitemap only contains the canonical versions of your URLs.

Redirect Duplicate Pages

Use 301 redirects to direct duplicate pages to the canonical version if appropriate.

Ongoing Monitoring and Testing

Maintaining the integrity of canonical tags requires continuous monitoring and testing.

Regular Audits

  • Conduct routine SEO audits to check the health of your canonical tags. Make this a part of your regular SEO maintenance.

Monitor Traffic and Rankings

  • Keep a close eye on the traffic and rankings of pages with canonical tags. A significant decline could indicate a problem with the canonicalization process.

Testing Changes

When you modify your website’s structure or content, test the impact on canonical tags. Ensure that new or updated pages have the correct canonical tags.

Utilize Google Search Console:

  • Regularly review reports in Google Search Console. Pay special attention to the Index Coverage report to identify any issues related to canonical URLs.

Track Canonical Tag Changes

Use a version control system or document changes to your website’s structure and canonical tags. This practice makes tracing and understanding the impact of specific changes easier.

 A/B Testing

For significant changes, consider A/B testing different canonical strategies. Determine which performs better for SEO and user engagement.

Keep Up with Algorithm Updates

Keep yourself updated on changes to search engine algorithms. These updates can impact the interpretation and application of canonical tags.

Ongoing monitoring and testing help identify and resolve canonical issues promptly. They also contribute to a deeper understanding of how these tags affect your website’s SEO performance. This proactive approach ensures that your website complies with SEO best practices. It also helps your site perform optimally in search engine rankings.

The Rel=Canonical Tag: You Can Rel=Conquer It.

Understanding and effectively implementing the Rel=Canonical tag is vital to master SEO for your website. This tag can help you manage content duplication, consolidate link equity, and guide search engines. It helps them understand which pages you deem most important when used correctly. Let’s break down this tag and how to “Rel=Conquer” it.

What Is the Rel=Canonical Tag?


The rel=canonical tag is positioned within a webpage’s HTML’s <head> section. It communicates to search engines the canonical or “preferred” rendition of a page, even when multiple versions exist.


The primary goal of the rel=canonical tag is to address issues arising from identical or “duplicate” content. This content can appear on multiple URLs. The tag specifies the preferred URL. This helps search engines consolidate ranking power to that specific URL. It prevents the dilution of search engine rankings.


When a search engine crawls multiple pages with similar content, the rel=canonical tag helps determine which page to index and rank. This mechanism prevents the search engine from mistakenly treating these pages as duplicate content. It avoids potential negative impacts on SEO.

How to Rel=Conquer the Rel=Canonical Tag?

Correct Implementation

Ensure the tag is accurately placed in your webpage’s HTML. It should point to the absolute URL of the canonical version (the complete web address).

Avoid Conflicts

Ensure that your canonical tags do not conflict with other signals, such as redirects or additional canonical tags. Consistency is crucial.

Use in Cross-Domain Content

Use the canonical tag if you have identical content across domains (e.g., for multi-regional sites). This directs to the preferred domain. This consolidates SEO value.

Regular Audits

Conduct website audits to verify the proper implementation of canonical tags. Do this, especially after updates or redesigns.

Handle Pagination Carefully

For paginated content, use the canonical tag judiciously. It should point to the main page of the series or acknowledge each page’s unique value.

Integration with Other SEO Practices

Canonical tags should be part of a comprehensive SEO strategy. This strategy should include proper internal linking and ensuring sitemap accuracy.

Definition and Function

  • Permanent Redirect: The ‘301’ status code is an HTTP response status code that signifies a permanent redirection.

URL Forwarding

 It effectively forwards users and search engines from the old to the new URL.

Importance in SEO and Website Management

Preserving Search Rankings 

  • When you move content to a new URL, a 301 redirect helps keep the search engine rankings for that page. It transfers most of the original page’s ranking power (or “link equity”) to the new URL.
  •  If you delete a page without a redirect, any links pointing to it will lead to a 404 error page. A 301 redirect ensures users and search engines are directed to a relevant page instead.

URL Changes

  •  are used when changing domain names, restructuring websites, or migrating to a new content management system. It’s used in cases where URLs might change.

Consolidating Duplicate Content

If you have multiple pages with similar content, you can direct all those pages to a single, authoritative version using 301 redirects. This helps manage duplicate content issues.

Technical Implementation

  • Redirects are usually set up at the server level. This involves changes in server configuration files, like .htaccess on Apache servers.
  • HTML or script-based redirects are less common and not recommended for SEO. They can also be set up using meta tags in HTML or JavaScript. However, these methods may fail to pass link equity effectively.
Best Practices
  • Use When Appropriate: Only use a 301 redirect when a permanent change occurs. For temporary moves, a 302 (temporary) redirect is more appropriate.
  • After implementing a 301 redirect, update internal links throughout your site. Point them directly to the new URLs.
  • After implementation, check for broken links. Monitor traffic and watch for changes in search engine rankings to ensure the redirect functions as intended.
  • Avoid Redirect Chains. Long chains of redirects (one redirect leading to another) can slow down page loading times and reduce link equity transfer.

Impact on User Experience

  • Seamless Transition: A 301 redirect is usually seamless for users. They are automatically taken to the new page without having to click anything or even realizing a redirect has occurred.


 The canonical tag is a simple yet powerful tool within SEO best practices. Its vital role is to manage duplicate content and consolidate page authority. To address URL canonicalization issues, it is recommended to select a primary URL for your webpage and set up redirects from all other variations to the preferred one. It also guides search engines and users to your website’s most relevant and authoritative content. Strategic use of this tag can notably enhance your site’s search engine rankings and overall online presence.

 Effectively managing the canonical issues in WordPress is vital to SEO. It ensures accurate indexing and proper ranking of your website’s content by search engines. Understanding the fundamentals of the canonical tag is crucial. Ensuring its correct implementation is also vital. Addressing common issues like incorrect or missing tags is also critical. These tasks play essential roles in maintaining the SEO health of your website. Utilizing plugins for streamlined management is also necessary.

The 301 redirects complement the canonical strategy. They permanently direct traffic from one URL to another, preserving link equity and preventing broken links. This strengthens your site’s SEO structure. Regular monitoring and audits are essential. They help identify and fix issues related to canonical or redirects. This ensures your website’s content is consistently and accurately represented in search engines.

Mastering canonical tags and 301 redirects in WordPress goes beyond fixing current problems. It involves adopting a proactive approach to SEO management. This aggressive stance ensures that your website is resilient against common pitfalls. It also enhances its visibility in search engine performance and delivers an enhanced user experience. Ultimately, this contributes significantly to your online presence’s overall success and authority.

How can I add a canonical tag in WordPress without a plugin?

To add a canonical tag in WordPress without a plugin, edit your theme’s header.php file. Place this code inside the <head> section: <link rel=”canonical” href=”YOUR-CANONICAL-URL” />. Substitute “YOUR-CANONICAL-URL” with the correct URL. Exercise care when modifying theme files. Consider implementing a child theme to preserve changes during updates.

How do I remove a canonical URL in WordPress?

You can use a plugin like Yoast to remove a canonical URL in WordPress. Go to the specific post or page, find the Yoast SEO meta box, and delete the URL in the canonical field. If you’re not using a plugin, you must manually edit your theme’s files where the canonical tag is set.

What should I do if the Yoast canonical URL is wrong?

If the Yoast canonical URL is incorrect, go to the post or page with the issue. Scroll to the Yoast SEO section and manually adjust the URL in the pastoral field. Ensure the URL entered is the preferred one you want search engines to index.

How do I fix missing canonical tags?

 To fix missing canonical tags, add a <link rel= “canonical”> tag to the head section of your web pages, specifying the preferred URL. Use SEO plugins to manage and add these tags across your site easily.

How do I fix canonical tags that point to redirects?

 If a canonical tag points to a redirected URL, update the tag to point directly to the final destination URL. This ensures search engines index the actual page. It also helps maintain link equity. Use an SEO plugin to streamline this process.

How do I address a non-canonical URL issue identified by SEMrush?

 If SEMrush identifies a non-canonical URL issue, verify the canonical URL set for the affected page. Update the canonical tag to the correct URL through an SEO plugin or edit the page’s HTML. Ensure consistency between the canonical tag and the content of the page.

Is there a canonical plugin for WordPress?

Yes, there are several canonical plugins for WordPress. Yoast SEO are two widely used plugins that offer canonical URL features, helping you to set and manage canonical tags on your website easily.

As you navigate the competitive landscape of online visibility, implementing effective SEO strategies is crucial for your business’s success. By optimizing your website, creating high-quality content, and staying ahead of algorithm updates, you can enhance your search rankings and attract more potential customers. Don’t let your competitors outshine you in search results—partner with us at seoboostweb to harness the full potential of SEO. Contact us today for a free consultation and take the first step towards achieving your digital marketing goals. Let’s transform your online presence together



Seo Freelancer is an SEO expert passionate about helping businesses succeed online. With years of experience in the ever-evolving field of search engine optimization, she has honed her skills and knowledge to stay ahead of the curve in the digital landscape.

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