https://www.cnbc.com/2019/04/01/facebook-new-tool-explains-why-am-i-seeing-this-post-on-news-feed.html

Facebook is rolling out a new tool that lets users find out why they're seeing certain posts on their News Feed.

The new feature, called "Why am I seeing this post?", essentially does what it says on the tin, showing a user the reasoning behind Facebook's ranking of posts from friends, pages and groups on their timeline.