To fight the spread of false news, Facebook uses a mix of technological solutions, human reviewers, and educational programs that promote news literacy. The Facebook community plays an important role, too: people can give feedback that a post on Facebook contains false news by clicking the three dots at the top of the post. But how does Facebook use that information?

To rank posts in your News Feed, Facebook looks at thousands of different data points, or signals, about the posts that have been shared by your community, including the people you’re friends with and the Pages you follow. Signals include a wide range of things, from how old a given post is and who posted it to little things, like how fast your internet connection is right now or what kind of phone you’re using.

One application of these signals is to help determine whether a post might be clickbait, false news, or other types of inauthentic content. Today, in the US, the signals for false news include things like whether the post is being shared by a Page that’s spread a lot of false news before, whether the comments on the post include phrases that indicate readers don’t believe the content is true, or whether someone in the community has marked the post as false news.

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