---
title: "Canonical Tag - SEO Glossary | SERPView"
description: "An HTML link element that tells search engines which version of a duplicate or similar page should be treated as the primary URL."
url: https://serpview.com/glossary/canonical-tag
---

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# Canonical Tag

An HTML link element that tells search engines which version of a duplicate or similar page should be treated as the primary URL.

A canonical tag is an HTML <link rel="canonical"> element that tells search engines which URL is the preferred version of a page. It is used when the same or very similar content is available at multiple URLs, such as tracking-parameter URLs, filtered category pages, HTTP/HTTPS variants, or duplicate blog paths.

Canonical tags help consolidate ranking signals. If several URLs show the same content, Google may split signals across them unless a canonical URL clearly indicates which page should be indexed and ranked.

Best practices: use absolute URLs, make the canonical self-referential on the preferred page, point duplicate pages to the clean canonical URL, avoid canonical chains, and keep canonical tags consistent with redirects, internal links, and XML sitemaps. A canonical tag is a hint rather than an absolute directive, but conflicting signals can cause Google to ignore it.

## Related Terms

[ Duplicate Content ](https://serpview.com/glossary/duplicate-content)[ Indexability ](https://serpview.com/glossary/indexability)[ XML Sitemap ](https://serpview.com/glossary/xml-sitemap) 

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