This document summarizes a panel discussion on social media for libraries. It introduces the three panelists - Lisa Bunker, who manages social media for a library, Doralyn Rossmann, who leads a data initiative at Montana State University, and Scott Young, who leads user experience at Montana State University. The panel then discusses key challenges for libraries with social media, how to analyze social media performance, practical benefits of analytics, specific tools used, building a social media strategy, and dealing with bad behavior on social media.