The research explains the notion of social networks since the beginning of networking; technology advances bring the accelerated development and appearance of different social networks. About the acceleration of the occurrence and the number of social networks in the research we are also illustrated by the illustration of the lens of time in which the appearance of social networks is shown. About the selected social networks are discussed later in the paper. The paper also covers the field of business communication, where the types and forms of business communication get acquainted with the concept more closely, after which the concepts of e - communications and e - marketing are also key to social networking. Selected networks are Linkedln, Facebook, Twiter, My Space, Google+, and they describe how they work and how they can best be used for promotion or advertising. Each of the networks individually lists some of the features and the way of opening the profile, and a court of fairness on promoting each and every one of them was objectively compared to others. It is considered to be the most cost-effective way for a company to promote, if available, all available social networks, which would increase the chances of success. The survey contributed and conducted a survey of about one hundred respondents through online surveys. In the survey, the respondents expected to express their opinions and experiences regarding promotional activities on social networks and the attitude that such activities reach to their own.