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Why is it important to have canonical tags on website pages?

In this article, we will explore the importance of having canonical tags on a website’s pages. Canonical tags are crucial in ensuring proper indexing and preventing duplicate content issues. Understanding canonical tags’ significance allows you to optimize your website’s performance, enhance user experience, and improve search engine rankings.


Canonical tags are HTML elements that inform search engines about the preferred version of a web page. They are essential for addressing duplicate content, which occurs when similar or identical content appears on multiple URLs within a website or across different websites. Canonical tags allow you to indicate the original or canonical version of a page, consolidating ranking signals and preventing search engines from treating duplicate content as separate entities.

When search engines encounter duplicate content without canonical tags, they may struggle to determine the most relevant page to display in search results. This can lead to diluted ranking signals, divided user engagement, and ultimately impact your website’s visibility and organic traffic. By implementing canonical tags correctly, you can guide search engines to the preferred version of your content and avoid these issues.

Common Issues:

Understanding canonical tags’ common issues or challenges is crucial for effective website auditing and SEO. Here are some scenarios you might encounter:

  1. Duplicate content across multiple URLs: If your website has different URLs with identical or similar content, search engines might index these pages separately. This can split the ranking signals, reducing visibility and organic traffic.
  2. URL parameters creating duplicate content: E-commerce websites often use URL parameters to filter or sort products. However, these parameters can generate multiple URLs with similar content, resulting in duplicate content issues.
  3. Non-canonicalized HTTPS and HTTP versions: Websites with HTTP and HTTPS versions can face duplicate content problems. Search engines may index both versions separately, causing ranking and traffic issues.

Impact and Consequences:

Failing to address canonical tag issues can significantly affect your website’s performance, user experience, and SEO. Here’s why it’s crucial to resolve these issues promptly:

  1. Diluted ranking signals: When search engines encounter duplicate content without canonical tags, they might divide the ranking signals across multiple pages. As a result, your pages may not rank as high as they should, leading to reduced visibility and organic traffic.
  2. Confused search engines and users: Without canonical tags, search engines struggle to understand which version of the content to prioritize. This confusion can result in poor user experience, as search engines may display irrelevant or inconsistent URLs in search results, leading to user dissatisfaction.
  3. Wasted crawl budget: Search engines allocate a limited crawl budget to each website. When duplicate content is present, search engines spend time and resources crawling and indexing multiple versions of the same content. This can prevent them from discovering and indexing other valuable pages on your site.

Addressing Issues:

To address canonical tag issues effectively, follow these actionable tips:

  1. Implement canonical tags: Identify the preferred version of your content and add the canonical tag to all duplicate pages, pointing to the original page. Ensure the canonical tag is correctly placed within the <head> section of your HTML code.
  2. Consistent internal linking: Use consistent internal linking to point to the canonical version of your content. This helps search engines understand the preferred version and reinforces the canonical signal.
  3. Resolve URL parameter issues: If URL parameters generate duplicate content, use URL parameter handling techniques, such as specifying parameter behavior in Google Search Console or employing URL canonicalization methods.
  4. Set up proper redirects: If your website has HTTP and HTTPS versions, set up redirects to ensure that all traffic is directed to the preferred HTTPS version. This helps consolidate the ranking signals and prevents duplicate content issues.
  5. Monitor and update canonical tags: Regularly audit your website to identify any new instances of duplicate content or missing canonical tags. Stay vigilant and update canonical tags whenever you make changes to your site structure or content.
  6. Leverage tools and plugins: Take advantage of SEO tools and plugins that can assist you in identifying and resolving canonical tag issues. These tools can provide insights, automate the process, and ensure that canonical tags are implemented correctly.

Remember, it’s crucial to thoroughly test and validate your implementation of canonical tags to ensure they are functioning as intended. Use tools like Google Search Console to monitor indexation and performance to confirm that search engines correctly interpret your canonical tags.


Canonical tags are a fundamental aspect of website auditing and SEO. By implementing canonical tags correctly, you can consolidate ranking signals, prevent duplicate content issues, and improve your website’s performance, user experience, and search engine rankings.

In this article, we have explored the importance of having canonical tags on a website’s pages. We discussed the impact of duplicate content, the common issues you may encounter, and the potential consequences of neglecting canonical tags. Additionally, we provided actionable tips to address these issues effectively.

By understanding the significance of canonical tags and following best practices, you can ensure that search engines interpret and rank your content accurately. Remember to regularly monitor and update canonical tags as your website evolves. We encourage you to refer back to this document whenever you encounter canonical tag issues during your site audits. With proper implementation, canonical tags can be a powerful tool in optimizing your website for search engines and enhancing user experience.


Larry Norris

With over 5 years of experience in agency work as an SEO Manager, I am proud to have assisted many clients in achieving higher search engine rankings and a stronger online presence. My successful track record includes top 3 rankings in SERPS, the attainment of featured snippets, and increased website domain authority.