Every time someone visits News Feed there are on average 1,500 potential stories from friends, people they follow and Pages for them to see, and most people don’t have enough time to see them all. These stories include everything from wedding photos posted by a best friend, to an acquaintance checking in to a restaurant.
Let’s say the average Facebook user is awake for 17 hours a day. To consume all that stuff, they would take in 88 new items per hour, or 1.5 things per minute. That’s just not possible.