At present, not all of the universities understands the usefulness of social networks for teaching and working insertion. However, both the teachers and the students make use of them. In USA, 100% of the universities make use of social networks in some way. The most widely used social network among American students is Facebook (98%), followed by Twitter (84%) and Linkedin (47%). In this paper, different uses of social networks in education and working insertion at School of Computer Science of University of La Laguna will be described (educational use, work insertion and social media).