By Adam Mosseri. Your News Feed is made up of stories from your friends, Pages you’ve chosen to follow and groups you’ve joined. Ranking is the process we use to organize all of those stories so that you can see the most relevant content at the top, every time you open Facebook.. Ranking has four elements: the available inventory of stories; the signals, or data points that can inform …

https://about.fb.com/news/2018/05/inside-feed-news-feed-ranking/