You specify the first URL since the search engine might have problem pinpointing which one particular ought to be the principal URL.  The subsequent tutorial will demonstrate how to permit Canonical URLs in Prestashop 1.5. Hook Overview: This hook permits you to increase any further fields or information to https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html