This course will teach you not just about the qualities and differences between social networks but also the impact they can have on our lives. You’ll learn how organisations can use these qualities to learn more about the people participating in the network, and the communities they represent, and will be encouraged to reflect on what your participation in online social networks tells the world about you. In fact the course itself is a social network. We encourage you to interact with other learners from all around the world to directly put into practice the lessons of the course and build your own online networks for learning and professional purposes. Other University of Southampton Web Science courses are Web Science: How the Web is Changing the World and an Introduction to Linked Data and the Semantic Web.