Open Graph Protocol is often a schema markup (It's also known as a vocabulary) made by Facebook in order to combine and relate Website pages and generate its rich illustration within the social graph. In practice, Open Graph makes it possible for Fb's Like Action 4: The module installation system https://www.presta-addons-modules.com/en/front-office/prestashop-tags-canvas-cloud-for-easy-navigation-search-seo.html