ReadMe automatically populates the meta title tag and meta description tag of each page with content from the Title and Description fields.
When the Description field is empty, ReadMe uses the first 300 characters of the body of your page as the Meta description instead.
Try viewing the source code for this page! This is what you'll see:
<meta property="og:title" content="Meta Tags">
<meta property="og:description" content="This description goes in the Meta description of the page">