As you'd expect, your feed will prioritize posts by people whom you've chosen to "see first," and those whose posts you're inclined to Like or comment on. "[I]f you tend to like photos from your sister," Facebook VP Adam Mosseri said, "we'll start putting her posts closer to the top of your feed so you won't miss what she posted while you were away." On the other hand, it will assume that you're not as thrilled to hear from people whose posts you hide all the time.
Since you probably follow various Pages, as well, such as those owned by businesses, publications or celebrities, the revamped News Feed also ranks their posts based on how informative and entertaining they are. If you liked a lot of stories about a certain celeb in the past, for instance, your News Feed will deem reports about that celeb informative and will make sure you see them in your stream. At the same time, if you're inclined to like photos and Live videos, then the social network will put those near the top.
The company also took the chance to say that it doesn't "favor specific kinds of sources -- or ideas" and that it's not "picking which issues the world should read about."
"Our aim is to deliver the types of stories we've gotten feedback that an individual person most wants to see. We do this not only because we believe it's the right thing but also because it's good for our business. When people see content they are interested in, they are more likely to spend time on News Feed and enjoy their experience. "
Facebook didn't detail what compelled it to issue that statement. If you'll recall, though, the Senate Commerce Committee launched an official investigation in May after the website was accused of routinely suppressing politically conservative news stories. The company denied the allegations that it gamed the Trending Topics section and announced after an internal investigation that it didn't find evidence of political bias.