Mari explains that the Facebook algorithm pre-filters content that users see in their news feeds. The algorithm manages the vast amount of content posted to Facebook and thus helps advertisers, while hopefully showing Facebook users the most relevant content among the thousands of posts they could see.
Users can have as many as 5,000 friends, join up to 6,000 groups, and follow up to 5,000 pages. With posts coming from all of these sources, users might see as many as 15,000 posts. Mari says that the Facebook algorithm narrows down what users actually see to about 1,500 posts, and from that pool of content, narrows what users might see even further to about 300 posts.
