Search engines like google and yahoo don’t index 4XX pages because they don’t perform. Therefore, they’ll ignore any canonical tags pointing to this kind of pages and infrequently end up indexing the wrong (non-canonical) version of the website page. Simply click to pay for Simplifiez l’expérience de paiement en tant qu’invité https://bookmarklayer.com/story18836076/the-was-ist-canonical-tag-diaries