Open Graph Protocol is actually a schema markup (Additionally it is called a vocabulary) created by Facebook in order to mix and relate World-wide-web pages and generate its rich representation within the social graph. In practice, Open Graph lets Fb's Like The 1st sample code could be the summary page; https://www.presta-addons-modules.com/en/free-modules/prestashop-scroll-to-top-of-page-move-on-a-page-from-bottom-to-top.html