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What are the benefits of using a canonical link?
Using a canonical link brings a number of benefits to your website's SEO optimization .

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Firstly , as we mentioned, it eliminates the problem of duplicate content, which allows you to avoid penalties from search engines.
Secondly , it allows you to concentrate SEO values on one page, which translates into better positioning.
Third , it makes content management easier because it allows us to control which similar pages should be indexed by search engines.
How to use a canonical link on your website?
Step 1. Identify duplicate content on your site
Before you add canonical links, it’s a good idea to check if there’s any duplicate content on your site. You can do this using SEO analysis tools. You can also use Google Search Console to check if Google has identified any duplicate content on your site.