The course, held as part of the Jean Monnet Module RESPECT (Rethinking Speech in Critical Times), aims to provide students with basic knowledge on the freedom of expression and, in particular, on “social media”. First, freedom of expression, as a fundamental right, will be analysed starting from its foundations. Subsequently, some phenomena closely linked to the freedom of expression on the net, in particular on social media, will also be analyzed. In this sense, the search for the balance between a maximum freedom of expression online, on the one hand, and the limits of it, necessary in a democratic society, will be of particular interest.