American youth are the most fervent users of social networks, with a far greater percentage of the population (65%) using networks than among adults. Nevertheless, 35% of American adults represents an enormous number of people and the bulk of users of social networks. This presentation dives into the demographics of teen and adult social network users and looks at how youth use of social networks compares to use by adults, both in frequency, but also in purpose and behavior. The Pew Internet and American Life Project study finds that youth and adults use the sites primarily for maintenance of offline social relationships and that younger users are more acutely concerned about their privacy on online social networks.