Based on our review of the extant literature, our research makes the following contributions to SNS privacy research. First, we create an integrative model that includes both tagging and app engagement with friends. Previous research tends to separate tagging and app behavior into two separate streams of research, which prevents any kind of comparative analysis. Second, our model examines tagging and app engagement with friends in relation to privacy and Facebook use. Past research focused solely on the privacy implications of tagging and apps, not on the potential relationship with overall Facebook usage. Third, by focusing on tagging and app engagement with friends, we extend privacy research beyond the individual level to incorporate the interactional aspects of privacy related to co-owned information shared between friends. Fourth, we examine all of these relationships in depth, within one cohesive model in order to facilitate a better understanding of the trade-offs that exists between personal privacy and engaging with friends on Facebook. Finally, we include a post-hoc analysis that delves into Facebook users’ mental models of tagging and app privacy, as well as examining self-reported privacy behaviors related to tagging and apps. In the next section, we will discuss our research framework and introduce our hypotheses.