Open Graph Protocol can be a schema markup (It is usually often called a vocabulary) designed by Fb in order to combine and relate web pages and create its rich illustration within the social graph. In practice, Open Graph makes it possible for Facebook's Like Stage four: The module set https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html