Sara Vera presents on how Causes.com uses data science to facilitate collective action and measure its real-world impact. She discusses analyzing user data through clustering and surveys to identify six key user personas. Causes then builds tools to connect users based on shared interests and inspire peer-to-peer sharing. Specifically, Causes collects demographic and behavioral data on user profiles, interests, networks, and online actions to target campaigns and measure outcomes like petition signatures against impacts such as policy changes. The goal is to optimize how campaigns are presented to better mobilize "slacktivists" into real-world activism.