I. Introduction
Nowadays the development of public communication goes along with the development of the public sphere. The contemporary public sphere is characterized with a number of signs, stated at the beginning of the XXI century by the French researcher D. Bougnou: it is the common integration of mass media with the individual private sphere; interpenetration of the economic market and the advertising, with the public sphere being influenced by economy [1] . The most important catalyzer of changes in public sphere is the modernization of mass media, its digitalization, which leads to the diversity of the public communication addressers.