Add to ORKGThis bachelor's thesis is focused on using social networks in commercial sector. Is divided in two main parts, in first part are defined social networks, given examples and described history. Thesis specially deals with selected networks and describes them in detail. Furthermore presents a possible use of social networks in corporate practice and provides concrete examples of offered functionalities. The second part focuses on a selected sample of companies in which identifies companies that use social networks (Facebook and Twitter) and studies them more. Studies real communication of these companies and analyze it further. At the end gives examples of good and bad communication and recommendations for using social networks in commercial s...