As mentioned in our documentation, media publishers should include Open Graph tags in their article’s HTML to generate better previews of their content when shared on Facebook. Today we’re introducing updates to two tags:
article:publisher lets a publisher link an article to their own Facebook page. When the article is shared in News Feed, a “like” button is displayed so people can like the publisher page.
<meta property="article:publisher" content="https://www.facebook.com/cnn" />
article:author lets a publisher link an article to the Facebook profile of the author. When the article is shared in News Feed, a “follow” button is displayed so people can follow the author. The author needs to have Follow activated on his or her profile for this button to appear.
<meta property="article:author" content="https://www.facebook.com/fareedzakaria" />