What is @highlight in facebook?

@highlight is a feature on Facebook that allows users to feature or highlight a specific post on their profile page. When a post is highlighted, it becomes larger and more prominent on the user's profile, making it stand out among other posts. This feature is useful for users who want to draw attention to a particular post, such as an important announcement, photo, or update. Highlighted posts also stay at the top of the profile page for a longer period of time, ensuring that they are easily noticeable by other users.