Glossary · Search and local visibility
Canonical URL
The preferred URL identified for a page when the same or closely related content can be reached through multiple URLs.
Also called: canonical
Definition
A canonical reference helps search systems understand which URL the site considers primary among duplicates or near-duplicates. Canonicalization also depends on redirects, internal links, sitemaps, status codes, and consistent production URLs.
Why it matters
Migrations and platform parameters can create multiple addresses for similar content, fragmenting signals and complicating reporting.
Common misunderstanding
A canonical tag is a signal, not an access control or unconditional command, and it does not repair unrelated or low-quality duplicate pages by itself.
Related terms
Related system family: Measurement & Search Signals
Sources
- Search Console API (opens in a new tab) · Google for Developers
Last reviewed July 16, 2026