The topic of this thesis is „Advertising on social networks“. This paper explains what marketing communications is and what its forms are, Internet marketing, e-commerce, mobile marketing, and advertising on social networks. The digital world is developing faster than anything before, and social networks are growing whit it. The development of social networks has changed the way the word communicates, so they are an important communication tool for creating, sharing, and spearing information for both companies and costumers. With that, advertising on social networks is a great success to easier targeting of users on low cost. As a part of the work, research was conducted through a questionnaire about the presence of advertising on social networks in the month of August 2022 through the online program Google Form. This survey is aimed at student and has been shared on social networks like Facebook and Instagram for voluntary resolution. 30 respondents answered the questionnaire.