The study defines terms from the social media field within the scope of the electronic educational environment as well as social media and social networks as a means of study support at a university. The research on a representative sample of the University of Ostrava and the University of Silesia students, which was carried out within the scope of the 7th RP IRNet project, is aimed at the analysis of the current situation regarding the use of social media by the university students and at the differences in the use according to the country of study.