Open Graph Protocol is a schema markup (it is also often called a vocabulary) designed by Facebook in order to combine and relate web pages and generate its rich illustration within the social graph. In follow, Open Graph allows Facebook's Like The first sample code will be the summary page; https://www.presta-addons-modules.com/en/front-office/prestashop-social-media-side-bar-links-buttons-on-all-pages.html