Open Graph is a protocol which enables rich previews on SocialMedia. It is heavily used on the web and there is currently little reason to not support outputting the needed metatags.
See https://ogp.me/
Here’s an example of an opengraph markup:
<html prefix="og: https://ogp.me/ns#"> <head> <title>The Rock (1996)</title> <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" /> ... </head> ... </html>
MycorrhizaWiki supports it.