Social media impacted various lines of work, therefore, it is important to research its impact on the public relations practice. It is a part of new media and a new source of communication. In this thesis, the focus is on describing the term of public relations and social media. When these terms are defined it is important to define the impact of social media on public relations. Social media's impact, in general, is strong. Since public relations' focus is on communication, social media plays a significant role in its practice. The emphasis of the thesis is on the impact of social media on public relations in Croatia. Public relations agencies' and practitioners' opinions about social media are thoroughly researched and defined in ...