A canonical URL is the master URL for a piece of content when duplicates or variants exist (e.g. with tracking parameters, http vs https, www vs non-www). Sites declare canonicals via a rel="canonical" link tag in the head. Mismatched or missing canonicals cause search engines and AI agents to split signals across duplicate URLs.
Run the free 50-signal AI Agent Readiness Check or talk to our AEO team.
Score my site