Socialnomics refers to how people work with social media. It is the topic of a book by Erik Qualman that examines the rise of social media and questions whether it is just a fad. The document defines Socialnomics, discusses what Web 2.0 is, and how social media has become the number one online activity, surpassing even porn. It provides statistics on how quickly Facebook reached 50 million users compared to other technologies like radio, television, and the internet.