From early on, competition between professions has been identified as a major factor in the process of developing public relations as a profession. This paper updates consideration of the influence of inter-profession disputes by examining the interplay between public relations and advertising in the digital age. It attempts to assess how new technologies, especially social media, affect the relationships between them, with particular reference to two aspects: whether social media increases, or decreases, professional cooperation (or competition); and who takes charge in the new communication environment. In researching these issues, which form an important part of the professionalization process of public relations, the paper examined documents and online publications, and undertook interviews and a survey of public relations practitioners in New Zealand. The findings suggest that the responding public relations practitioners were not able to take advantage of the social technology in order to leverage their professional status and improve their position within the organization. In addition, it seems that while advertising and public relations are still looking for ways to benefit from social media, both are still in a process of adaptation.