Facebook knows the facade that you want to present to the world.
Google knows what you want (or what you want to know).
Now, each of these is actually only addressing the front-facing portion of the business. Each company obviously has much more information when you begin to consider their link tracking, advertising network tie-ins, communication mining and external domain 'likes'.
But it's good to remember that Google's advertising is so damned valuable because you're already looking for stuff when you go there.
Facebook knows the facade that you want to present to the world. Google knows what you want (or what you want to know).
Now, each of these is actually only addressing the front-facing portion of the business. Each company obviously has much more information when you begin to consider their link tracking, advertising network tie-ins, communication mining and external domain 'likes'.
But it's good to remember that Google's advertising is so damned valuable because you're already looking for stuff when you go there.