Open Graph Protocol is really a schema markup (Additionally it is known as a vocabulary) developed by Facebook in order to mix and relate World-wide-web pages and build its rich representation within the social graph. In practice, Open Graph lets Fb's Like If you don't consent to use of cookies, https://www.presta-addons-modules.com/en/front-office/prestashop-social-live-chat-support-with-messenger.html