Public relations are one of the key business functions and a necessary strategic resource of every modern organization, regardless of its activities. The concept represents continuous and two-way communication between the organisation and its target, internal or external, public. Relations are constant, but what these relations will be, and the causal role of the organisation in the public, depends largely on the organisation's communication capabilities. In literature there are more than a thousand definitions of the concept of public relations. Over time, the term was used in many contexts and marked various functions and activities. This paper includes the problem of defining the term and a brief overview of the historical path of public relations, with an indication of the most significant changes that marked them on that path. It is a short road of domestic public relations, but it does not reduce their value and importance in today's society and business. The organisation can communicate successfully with the environment only if there is good communication and coordination within it. Communication in public relations, especially internal and crisis, are key areas of research in this paper. Modern public relations are a strategic activity that can determine the fate of individuals, organizations and the state itself in certain circumstances. It doesn't sound excessive in the context of recent challenges, from earthquakes to a virus pandemic. The purpose of the paper is to provide as complete and up-to-date an overview of the theory and practice of public relations in the context of communication as possible, and as a result an answer to the question will be offered - what are today public relations in a society that is constantly communicating.