Review canonical without hiding useful pages

A canonical link describes the preferred address for similar content. A self-referencing canonical is common on unique permanent pages. Use one link in the head that resolves to a valid HTTP or HTTPS URL. Relative addresses are resolved against the document base.

For example, a campaign URL /product?campaign=spring may point to /product when the content is equivalent. A translated page normally points to its own language URL rather than forcing every translation to English. Align internal links and sitemap entries with the preferred addresses.

Revbu reports every declared canonical and flags missing or multiple declarations. It does not fetch the target or decide whether the content is equivalent. A syntactically valid canonical can still point to a broken, blocked or unrelated page; check that separately.

After changing canonical, inspect the affected page and the target, then monitor the search engine selected canonical. Canonical is a signal, not a promise that another address disappears. Avoid bulk changes until you understand existing valuable URLs and redirects.