This diploma thesis aims to describe and compare usage of social media in marketing communication of fashion brands. Also, with regards to results of main analysis, it aims to assess relevance of social media on fashion market and to suggest recommendations for usage of its potential to the fullest. Methods of analysis, content analysis, focus group and in-depth interviews were used in order to explore issues at hand from multiple perspectives. The output of this thesis is a comparison of utilisation of different social media platforms in a fashion departement. The main contribution to this thesis are recommendation, which are telling how to effectively use social media platforms in the departement of fashion marketing, and also assessment ...