Tags that are used to direct to pages that are requested to be crawled and indexed. Canonical tags are used especially to prevent web pages that have the same or very similar content from being treated as duplicate pages by search engine bots. In such cases, the canonical tag of the web page with the main content to be indexed and the canonical tag of the web page with identical or similar content should point to their respective pages which must be detected by the search engine bots. Thus, the problem of duplicate content will be eliminated.
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