This document discusses social media as a domain for CSCW research. It outlines that social media has become an important venue for collaborative practices. While research approaches vary, CSCW is uniquely positioned to study social media through established lenses like social networks, communication, and practices. Examples of research topics involving social media are discussed, such as disaster response and political movements. Challenges include the diverse landscape of social media and issues of data collection. The road ahead involves consolidating CSCW's unique perspective on studying collaborative activities through social media.