In 2010, Facebook introduced the Open Graph protocol, which enables integration between Facebook and other websites by turning them into rich "graph" objects with similar features as Facebook objects. The Open Graph was initially developed by Facebook and was influenced by several technologies, including Dublin Core, link-rel canonical, Microformats, and RDFa.
Other social media platforms are also leveraging social meta tags. Most of the major platforms, including Twitter, LinkedIn, and Discord, support Open Graph tags, and they are also recognized by messaging platforms like Slack, Teams, WhatsApp, and others.
Twitter has its own set of meta tags known as Twitter Cards, but if the Twitter robots can't find these, they resort to using Open Graph tags instead.