The Best rel=canonical Guidelines and How to Implement it

SEO May 01, 2020 5 min read

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The Best rel=canonical Guidelines and How to Implement it
Canonical is the same meaning as preferred, it’s a part of search engine optimization because it gives a hint to crawler bots to choose the preferred URLs. Its essentially used to provide the right information to search engines for how to choose the best copy of your URL. In other meaning, it gives the search engines a signal to determine which page should be delivered in their results.

What is Rel Canonical Tag?

rel=canonical is a part of meta data which is stored in meta tags that placed in the head of your HTML, its most often used to prevent duplicate content and reduce multiple URLs versions of your site. Most of duplicate content issues happened because misconfiguration of your server or your theme create multiple urls for widgets or categories and here is comes the great role of rel=canonical to fix all these multiple unwanted urls.
<head>
<link href="https://example.com/preferred-url/" rel="canonical" />
</head>
Canonical preferred url

Why you Need Rel Canonical?

No one can rid of the site’s problems forever, sooner or later you will wake up to some issues generated from WordPress, plugin conflict, or even server failure. Duplicate content is the ugliest problem i ever met because it hurt your SEO rank without any warning. So, you have to keep your eyes open for such problems.Here is some important reasons for using rel canonical tag:
  • Widgets or categories multiple urls
  • Point index.html url to the main home page url
  • Point default.asp / aspx url to the main home page url
  • Site with dynamic URLs “https://www.example.com/page.html?parameter=1”
  • Useful to solve www and non-www duplicate content because both point to the same page
importabt of canonical

Common Mistakes with Rel=canonical

1- rel=canonical to the first page of a paginated series As we started before rel=canonical is used to point duplicate page to the original, master and preferred page. But page 2, page3, etc are not duplicated pages and point them to your home page will result to de-index of these innocent pages.2- Place rel=canonical in the <body> rel=canonical is one of meta tags that should be placed in the head of your page , and place it in the body instead will result in HTML parsing issues3- rel=Canonical is not replacement of 301 Redirects The critical difference between both is: that a 301-redirect takes the visitor to the canonical URL, while a rel=canonical tag does not. Because rel=canonical is just a hint or signal to guide the crawler bots for which page should be taken as preferred. As Matt Cutts has claimed that the search engine prefers the use of 301 redirects because Google’s spiders can choose to ignore a canonical link element if they feel it is more beneficial to do so.Hint: here is more explanation about 5 common mistakes with rel=canonical usage.

How to Implement Rel Canonical Tag?

rel=canonical is a powerful tool in SEO optimization but you should use it carefully and wisely to prevent any mistakes that you may regret for it in the future. Without going through many complications of codes and falling in many problems, wordpress seo plugin by yoast will take care of this dangerous tag. Just installed and you are done, there is no any options you should configure. It will work just perfectly.Canonical Tag Implement

rel=canonical Best Practices

  • Don’t use rel=canonical when it should be 301 redirect.
  • Don’t canonicalize paginated archive pages to homepage.
  • Use absolute paths rather than relative paths with the rel=”canonical” link element.
  • Don’t implement multiple rel=canonical tags on the same page because this will result in destruction.

Common questions about Best rel=canonical Guidelines and How to Implement it

What is rel=canonical and why is it important?

The rel=canonical tag tells search engines which version of a URL is the preferred one, helping to consolidate duplicate content and preserve SEO value.

How does the rel=canonical tag affect SEO?

It prevents duplicate content issues by consolidating link signals to the canonical URL, which improves ranking clarity and indexation accuracy.

Where should I place the canonical tag?

The canonical tag should be placed in the head section of the HTML document of each page.

Should every page have a canonical tag?

Yes, it’s best practice to include a self-referencing canonical tag on every page to avoid confusion and reinforce preferred URLs.

Can I use rel=canonical across different domains?

Yes, cross-domain canonicals are supported, but should be used carefully to avoid unintentional traffic loss or authority misdirection.

What happens if I set the wrong canonical URL?

Incorrect use can lead to deindexing of important pages, loss of search visibility, and dilution of link equity.

Is it necessary to canonicalize paginated content?

Yes, pagination should be handled with either canonical tags or proper rel=next/prev attributes to avoid duplicate content issues.

How do I implement canonical tags in WordPress?

Most SEO plugins in WordPress add canonical tags automatically, but you can also insert them manually in the head section of your theme files.

Should canonical URLs be absolute or relative?

Canonical URLs should always be absolute to avoid misinterpretation by search engines and ensure consistency.

Can canonical tags replace 301 redirects?

No, canonical tags suggest the preferred version, while 301 redirects enforce it. Use canonicals for duplicates and redirects for permanent moves.

Written by: TopSeoTut Engineering

A dedicated team of senior software engineers and technical SEO experts. Every article is peer-reviewed and field-tested to ensure maximum accuracy and actionable insights for modern enterprise architectures.

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