http://www.youtube.com/watch?v=_QPhd6prvEI

This is one way wherein Facebook can be quite different from AdWords content network. We say Toto, I have a feeling that we’re not on the display network anymore, because at the very least on the display network, you’re always being trained ads that bear some relevance on the page that you’re on or are looking at. With Facebook, you’re obtaining shown ads aren't necessarily tightly related to the page you’re looking on, and they are certainly not a result some keyword we just typed in.