AD> This collected volume gathers a broad spectrum of social science and information science articles about Facebook. It looks into facets of users, such as age, sex, and culture, and into facets of use, e.g. privacy behavior after the Snowden affair, unfriending on Facebook, or Facebook addiction, as well as into quality perceptions. Written by leading scholars investigating the impact of Web 2.0., this volume is highly relevant for social media researchers, information scientists, and social scientists, and, not least, for everyone interested in Facebook-related topics.