The average user’s News Feed has around 1,500 possible stories filtered through per day, according to Lars Backstrom, engineering manager for Facebook’s News Feed ranking. But only 20% of them actually make your feed. So how does Facebook determine which 20% you see?
Scores are determined using a number of factors, such as the relationship you have with the user who posted it, the number of comments, the number of shares, and the number of likes that the story has accumulated.
A change in the ranking process now enables older stories (stories that may have been posted earlier in the day but the user never actually scrolled through) to join the “new” stories at the top of your feed.
Read more at ABC News
