https://www.youtube.com/watch?v=QwEQKM4YRnU
basically a way for when you share a link for it to have custom descriptions and images https://ogp.me/
<meta property="og:title" content="The Rock" />
<meta property="og:type" content="video.movie" />
<meta property="og:url" content="https://www.imdb.com/title/tt0117500/" />
<meta property="og:image" content="https://ia.media-imdb.com/images/rock.jpg" />documentation is pretty short