This paper reviews the existing literature on the relationship between social media and violence, including prevalence rates, typologies, and the overlap between cyber and in-person violence. This review explores the individual-level correlates and risk factors associated with cyber violence, the group processes involved in cyber violence, and the macro-level context of online aggression. The paper concludes with a framework for reconciling conflicting levels of explanation and presents an agenda for future research that adopts a selection, facilitation, or enhancement framework for thinking about the causal or contingent role of social media in violent offending. Remaining empirical questions and new directions for future research are discussed