The same technology that helps Facebook track friendships and likes is powering a mutli-company effort to stop spammers and scammers.
If there's one thing Facebook is good at, it's getting people to share their data and using it to track the relationships between people, places, and things. Knowing which of its 1.39 billion monthly users are friends with each other or have friends in common helps Facebook learn, for instance, what kind of updates and ads are going to keep them clicking and tapping through their news feeds.