Facebook’s new Graph Search is unlike any other search engine. It opens the vault of likes and interests stored in Facebook and combines it with meaningful social identity.
In other words, it’s something only Facebook could do.
When people sign up for the social network, they list their age, gender, relationship status, hometown, current city, schools, workplace and much more. Every subsequent action people take on Facebook is connected to that identity, so when someone Likes a movie or checks into a restaurant, Facebook starts to get a picture of the type of person who is a fan of a particular movie or goes to a certain restaurant.