Facebook has launched its Open Graph API and social plugins to cement its position at the center of the web for its 400 million users. The Open Graph will allow Facebook to build a deep understanding of users' interests by collecting data from partner websites about content users like and share. This could help Facebook depose Google as most people's homepage and primary way to navigate the internet by offering personalized recommendations. However, publishers must be wary of seeing their ad revenues shift to Facebook, and users may be uncomfortable with more of their interactions being made public and catalogued in their profiles.