The aim of this paper is to provide a conceptual theoretical framework to the term "social" in a social media context. This is done by exploring the relationship between three central terms in a social media environment: information, interactivity, and sociability. We suggest a model that describes the relations between these terms in a social media context. As the model suggests, information is the basic unit of a communication process, but social media users are the ones that decide whether and how much information to share, and when and whether to comment on a social media platform. Hence, not solely the technological features of a platform determine its level of interactivity and sociability, but the actual performances of its users.