Approximately one year ago, Park Geun-Hye, the then president of South Korea, was impeached. Civic discontent embodied through massive street protests played a critical role in her impeachment. Many have speculated that the rise of social media played a role in the processes leading up to her impeachment. What role did social media play in formulating people’s beliefs? Did social media mobilize people to participate in political protests? What characterizes social media users and what are the implications going forward? In this presentation, Yong Suk Lee of Stanford University examines these questions using a survey he conducted before and after the impeachment of Park Geun-Hye, and ultimately aims to shed some light on how social media and news disseminated through social media might affect society.