https://ogp.me/ - Open Graph is a meta protocol that a web page into a graph object.
The Open Graph protocol was originally created at Facebook and is inspired by:
<meta property="og:type" content="article">
<meta property="og:title" content="Categories">
<meta property="og:url" content="https://en.support.wordpress.com/posts/categories/">
<meta property="og:description" content="Categories provide a helpful way to group related posts together, and to quickly tell readers what a post is about. Categories also make it easier for people to find your content. Categories are si…">
<meta property="article:published_time" content="2010-10-21T16:49:34+00:00">
<meta property="article:modified_time" content="2019-07-30T21:50:01+00:00">
<meta property="og:site_name" content="Support">
<meta property="og:image" content="https://en.support.files.wordpress.com/2019/03/categories-category-page.png">
<meta property="og:image:width" content="700">
<meta property="og:image:height" content="461">
<meta property="og:image:alt" content="Categories - Category Page">
<meta property="og:locale" content="en_US">
<meta property="fb:app_id" content="249643311490">
<meta property="article:publisher" content="https://www.facebook.com/WordPresscom">