Our aim for this special issue is to bring a few novel approaches to platform governance which can be applicable to social media and other online platforms. The different scholars included in this issue approach social media governance through different lenses, and sometimes use different terminology (e.g., “platforms” vs. “technology firms” vs. “social media companies”). Yet the common thread is the importance of exploring new ideas for managing the social impact, good and bad, that these large players have in our society.