Once hailed as a liberating, democratizing technology, social media platforms are now controversially discussed as potential threats to democracy and freedom of expression. Where does freedom of opinion end, and at what point do we talk about censorship? How should users be protected and from whom? To what extent may platforms intervene, and do we need additional state regulation? In this episode, Johanna Palla and Ann-Kathrin Rust discuss the most burning questions with the platform governance expert Dr. Clara Iglesias Keller from the Social Science Center Berlin and the Leibniz Institute for Media Research.