Canonical URL
A canonical URL lets you tell search engines that certain similar URLs are actually the same. Because sometimes you have products or content that can be found on multiple URLs or even multiple websites. By using canonical URLs (HTML tags with the attribute rel=canonical) you can have these on your site without harming your rankings.
What is the canonical link element?
The rel=canonical element, often called the canonical link, is an HTML element that helps webmasters prevent duplicate content issues for SEO. It does so by specifying the canonical URL, the preferred version of a web page and this improves your site's SEO rankings.For example:
You want people to see specific page in search results if you have more than one page on similar topic. You might prefer people reach your green dresses product page via https://www.example.com/dresses/green/greendress.html
rather than https://example.com/dresses/cocktail?gclid=ABCD.
Add below HTML code in the <head> section :
<link rel="canonical" href="https://www.example.com/dresses/green/greendress.html">
Source :
https://developers.google.com/search/docs/advanced/crawling/consolidate-duplicate-urls
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