Facebook literally tries to group your interests, likes and basically who you are into little accurate boxes or categories, and it basically looks like this;

  This is still just a brief of what Facebook knows about you, yet it’s enough to give a perfect stranger a general idea about who you are. While viewing my profile I learned that I’m more interested in business and industry than lifestyle and culture topics, something that I never realized about myself up until now. Before today I’d swear to you that I live and breathe lifestyle and culture. Facebook taught me a little something about myself. A look into my profile would reveal that I’m a 20 year old, law student and blogger living in Kenya, who is single, with a rather unhealthy obsession with the Daily Show. A little too much information, considering most people close to me don’t even know the Daily Show part.   It’s amazingly accurate, which is somewhat eerie. You can check your ad profile here, to find the information that best describes you. It should be fairly precise, but if it isn’t you can delete ad groups you don’t believe you fit in. Do don’t however, delete the ad groups assuming you won’t receive any more adverts, you still will, they’ll just be a little more random and much less to your liking.

Facebook Knows Way More about You than You Think  Here s how - 42