"Was ist der Reiz der sozialen Medien? Wie das Internet Selbstdarstellung, Beziehungspflege und Informationsverhalten beeinflusst [What's the Appeal of Social Media? How the Internet Influences Self-Portrayal, Relationship Management and Information Behaviour]", lecture by J.-H. Schmidt at the symposium on student exchange organised by the deutsche Fachverband High School e.V. [the German Association High School e.V.] on 4 December 2018 in Hamburg.