The article develops a categorization scheme for collective activities facilitated by social media. I introduce a six-part scheme consisting of two distinct dimensions: the character of the activity (deliberative or participatory) and the platform where the activity unfolds—within social media platforms; outside social media platforms but still online; or in offline settings. While existing models provide a foundation for understanding collective actions on social media, they often overlook the nuanced interactions between online and offline activities, and the transition between different characters of collective activities. The proposed model addresses these gaps by incorporating a more granular analysis of activity types and platforms, enhancing our ability to understand and leverage these dynamics for more effective mobilization and advocacy. This categorization is justified and substantiated through a netnographic study of the social media campaign advocating for justice for Roman Zadorov, in Israel.