That’s because Graph Search will, for the first time, make it possible to search your own Facebook history. You can search for “videos I liked” or “photos that Dan posted that I liked,” for example. And you could, in theory, use the search tool to get aggregated friend recommendations, too: You can search for doctors, restaurants, or movies that your friends have endorsed—so long as that endorsement came in the form of a click on a Facebook Like button.