When you share a post or a page on Facebook, it would pull the first few lines of the post and use it as content description.
Where does Facebook get the description?
Facebook pulls the description from the following sources, in this order:
- First it looks for a description meta tag, and uses the content as description.
- If there is no description meta tag found, Facebook looks for the first <code><p></code> (paragraph) tag that contains at least 120 characters.
- If none of the above is available, it leaves the description spot blank.
According to Facebook, it scrapes your page every 24 hours to ensure the description (and other share data) are up to date. However, you can manually refresh it by entering the post URL into the Facebook URL Linter