Open up your Facebook account and usually the first thing you'll see on your page is your News Feed, that combination of friends' posts and updates from so many pages that you've liked. But what you see in your News Feed is only a fraction of what your friends and your likes are posting. Depending on how many friends and likes you have, what Facebook shows you may only be a tiny fraction of all those posts.
Behind the scenes, Facebook is constantly deciding what makes the cut to show up on your page - and what gets shuffled off never to be seen by you. And they often tweak how they decide what gets displayed. Facebook can never leave well enough alone. Sometimes change is for the better, sometimes not so much. Do you remember the last time Facebook overhauled your News Feed? It ended up just showing people a ton of sponsored posts, articles your friends liked or shared and related content. If you use Facebook to keep in touch with your friends and find out what's going on in their lives, Facebook got worse.
This time it's not a huge change, it's more like a couple minor adjustments. It doesn't have as much to do with what you see, but when you see it. There are basically two changes to how Facebook decides what to show you:
The first takes into account what topics are trending at any given moment. If it's Monday night in the middle of the Monday Night Football game, you're now much more likely to see posts about football, the NFL and the game. The next day, those posts will have less priority. If you post about a topic that's trending at any given moment, your post is more likely to show up higher on your friends' News Feeds. Here's Facebook's logic:
Early testing of a small percentage of posts has shown that this update on average leads to a more than 6% increase in people engaging with these stories (e.g., more people share, comment, like or click).