Search engines like yahoo don’t index 4XX pages given that they don’t do the job. Subsequently, they’ll dismiss any canonical tags pointing to this sort of pages and often turn out indexing the wrong (non-canonical) version of your website page. Copy material appearing inside the SERPs: This may lead to the https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html