What does the < meta property="article:tag" content="facebook" > tag provide?

Question

Facebook

What is this line in the page code for and what does it give? I'm interested in the layout of the page for the blog, so that later I can repost it beautifully. <meta property="article:tag" content="facebook" />

Answer 1

This is not the most important meta tag for Facebook. If you do not use others, then this one, by itself, will not be of much use to you. These tags are called Open Graph markup .
The Facebook documentation states that the tag is used to set an array of keywords related to the article .
In general, meta tags for Facebook, Twitter, Google+, VKontakte, etc. help them present the shared content from your site in a more appropriate way. The social network will not just randomly take a picture and a piece of text from your page, but you will be able to control this process. Moreover, you can use special formats for displaying information in the form of various cards, etc.
Here is a tip on what meta tags you need the least:Must-Have Social Meta Tags for Twitter, Google+, F...
Here are examples of usage: Meta tags for social networks Facebook, Twitter and...
Tips for optimizing pages for Facebook
Also, you can find out how Yandex perceives Open Graph: Markup open graph