Facebook is constantly working to make your News Feed more efficient, and better. This time, they'll also make things more interesting as they will start showing you trending stories to the right of your News Feed, just under where you're used to seeing notifications about your friends' birthdays and upcoming events.

Facebook's trends promise to be personalized to your interests. We wonder what that means exactly. The feature is apparently rolling out in waves to Facebook's massive audience, and while the topics seem pretty general, some do reflect personal interests that might not necessarily hit everyone's feed.

Trending stories reflect those that have seen a sharp uptick in popularity. It is likely to reflect something that a lot of people are talking about, rather than a slow burning type of story that's picking up attention slowly.