The Facebook news feed is what you see as soon as you login to your account, and as it turns out, they’re watching how you use it a lot closer than you realize it does.

We all know that Facebook monitors the amount of clicks and “likes” you give something in your news feed, and it tailors results based on things you pay attention to. But the social network is going a bit further by tracking exactly how much time you spend lingering on a particular post on the feed, according to an Engadget report.

Facebook points out why in a statement: just because you didn’t like or comment on something, or share a story with your friends, it doesn’t mean you weren’t interested in it. Sometimes you enjoy reading something but, for whatever reason, you don’t go beyond that.

It still doesn’t mean you don’t want to see more stuff like that. Maybe you were embarrassed to share it with others. Maybe you thought about it but ultimately got distracted by something else. Or maybe it tickled your fancy a little, but not enough to go the extra step of putting your stamp of approval on it.

Facebook is taking advantage of its access to your news feeds to watch how long you linger, and it has safeguards in place in its algorithm to take into account whether you are lingering because you’ve left your computer or you have a slow Internet connection. It will do this by comparing how long you linger on something with your typical browsing habits.

With this method, Facebook believes it can create a better news feed filled with stuff that is actually important to you without a lot of the stuff that isn’t.

When can you expect to see some changes? you probably won’t notice anything jarring, but in the next few weeks the feature will roll out gradually, and so you may see some adjustments to your news feed as a result.