The way the company figures out if something is useful is via a Feed Quality Program, a crowd-sourced survey where people rank a link on a scale from one to five, with five being "really informative." According to Facebook, a link is deemed informative if it's related to interests, if it prompts greater discussion or if it reveals a lot about current events like, say, the presidential race.

This so-called "ranking signal" is then combined with several other Facebook metrics -- such as your relationship to the person or publisher who posted the piece and if you tend to comment or share similar links -- so you'll hopefully get informative and interesting stories that are tailored to you. This NewsFeed update is rolling out today, and will change over time as your interests and tastes evolve.