SAN FRANCISCO (KCBS) — Facebook is changing the way it decides what appears in your news feed. What some people may not realize is that they might not see every post their friends make in their News Feed.

The social network is changing their algorithm, but why? It’s probably worth noting that Facebook said there are more than 100,000 variables that go into the algorithm that decides whether a post is seen.

If we are friends, eventually I will see it (depending on how much I’m paying attention to Facebook). But the algorithm also plays into where in my feed the post will go. Will it be near the top, or will I have to scroll much?

Your Facebook relationship is very much a factor at play here, but not necessarily your real-life relationship. How often you interact with a person or the number of likes on their posts and if you tend to comment on their posts are all variables as to where their posts are placed in your News Feed and vice versa.

Just because you are friends, doesn’t necessarily mean you’re going to see their posts.

With the latest changes, if you post a link and you want it to get the most attention, make sure that the link also includes a preview picture. You have an option to uncheck the preview pic box, but the picture will get more views than just a plain old link.

The average Facebook user apparently gets 1,500 posts a day that they could theoretically see. It really depends on how much the user is logging in. Facebook claims they’re helping us sort through the noise by prioritizing and showing us what they think we’ll like.