What is canonical tag?

Jump to: navigation, search. A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical" or "preferred" version of a web page as part of search engine optimization.
 
The canonical tag is a new tag proposed by Google, designed to minimize crawl errors and the indexing of duplicate content in your website. Support for the tag has been adopted by most of the search engines, and it’s a good idea to add to your own website if you want to get your best search engine rankings.
 
A Canonical URL allows you to tell search engines that certain similar URLs are actually one and the same. Sometimes you have products or content that is accessible under multiple URLs, or even on multiple websites. Using a canonical URL (an HTML link tag with attribute rel=canonical) these can exist without harming your rankings.
 
A canonical link element is an HTML element that helps webmasters prevent duplicate content issues by specifying the "canonical" or "preferred" version of a web page as part of search engine optimization. IN simple language canonical tag is a way of telling search engines that a specific URL represents the master copy of a page.
 
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