Why Google may ignore your canonical tag
A practical explanation of the mixed signals that make canonicals easier for search systems to override.
A canonical tag is a strong hint, not a command. When search systems see a canonical that conflicts with the page content, the internal links, the sitemap, or the overall URL structure, they may choose a different version than the one you intended.
The most common reason canonicals get ignored is inconsistency. If a page says one URL is preferred but all the navigation, breadcrumbs, and XML sitemaps point to another version, the canonical is no longer the clearest signal on the page.
The best fix is rarely to change only the canonical tag. It is usually to align the surrounding signals so the preferred URL becomes obvious everywhere: links, redirects, sitemap entries, and the page-level metadata itself.
Use this guide when you want a little more context before publishing, need a quick refresher on best practices, or want to avoid the mistakes that commonly lead to crawl or indexing issues later.
If you want to apply this advice immediately, use the related tool and compare the output against the points covered in this guide.