The goal of every update to News Feed is to show people the most interesting stories at the top of their feed and display them in the best way possible. We regularly run tests to work out how to make the experience better. Through testing, we have found that when people see more text status updates on Facebook they write more status updates themselves. In fact, in our initial test when we showed more status updates from friends it led to on average 9 million more status updates written each day. Because of this, we showed people more text status updates in their News Feed.
Over time, we noticed that this effect wasn't true for text status updates from Pages. As a result, the latest update to News Feed ranking treats text status updates from Pages as a different category to text status updates from friends. We are learning that posts from Pages behave differently to posts from friends and we are working to improve our ranking algorithms so that we do a better job of differentiating between the two types. This will help us show people more content they want to see. Page admins can expect a decrease in the distribution of their text status updates, but they may see some increases in engagement and distribution for other story types.
https://newsroom.fb.com/News/787/News-Feed-FYI-What-Happens-When-You-See-More-Updates-from-Friends
We push our clients to hammer on shareable images and videos as the #1 priority, but I know a LOT of page marketers are still using text updates with links as their #1. Time to get moving on making the switch...