This document summarizes a webinar about using social media to mobilize community leaders and their communities for influenza preparedness. The webinar covered how social media can facilitate communication and engagement. It provided examples of social media strategies, including determining goals, identifying audiences, selecting tools, setting up accounts, listening to conversations, and engaging communities. The webinar also outlined best practices for social media use and discussed how specific tools like Facebook, Twitter, and blogs can be leveraged to share information and encourage actions like obtaining vaccinations.