Canonical links
A canonical link identifies the preferred representative among duplicate or near-duplicate URLs.
How it works
Search systems combine the declared canonical with redirects, internal links, sitemap entries, content similarity, and other signals before selecting a representative.
How to validate it
Make redirects, internal links, sitemap URLs, and canonical declarations agree, then verify that duplicate variants remain fetchable but are not promoted as primary.
Common failure
Canonical is a hint rather than an unconditional command; conflicting signals can cause a crawler to choose a different URL.
Machine-readable editions
The same article is available as Markdown and JSON. These alternates are linked here but are not submitted through the sitemap or IndexNow.