What is a pinned post on facebook?

A pinned post on Facebook is a post that the page owner decides to pin to the top of their feed. This means that the post will always be the first thing that visitors see when they visit the page, regardless of when it was originally posted. Pinned posts are often used to highlight important information, announcements, promotions, or events that the page owner wants to make sure visitors see. Page owners can only have one pinned post at a time, and they can choose to unpin it at any time.