The article is devoted to the methods of psychological influence which are used in social networks, Facebook in particular. The goal of the research is to learn, analyze and determine psychological methods of influence on the social network users, which are used in the strategies of companies’ promotion on the market. The complex of methods of the theoretical (analysis, synthesis, comparison, generalization of the theoretical and experimental developments of the researched topic in the scientific literature, systematization, scientific interpretation) and empirical research has been applied to achieve the assignments. The content of the most successful five Ukrainian pages in the social network Facebook has been analyzed in the process of research. Psychological study of effects on the users of social networks, which are used in the promotion strategies of the companies on the market, had discovered that the main of them are: news, publications, competitions, announcements, promotions, jokes and pictures (if it is possible - theme ones), photos and videos, answers for the questions, that can be either in the public domain and in the form of personal. Most of the content, which is published, must comply with the direction of the company, so any way to be associated with it. The most effective are the adverts, the lack of which is the impossibility of continuous use. The competitions take the second place. Most of the content in social networks aimed at promoting get feedback in terms of the following options: accessibility, brevity, curiosity. Announcements and Competitions perform tasks in advance when they do not require complex actions of participants. Relevance of the chosen topic is determined by the market demand in general and strategic prospects of economic psychology in particular. The scientific novelty of the research is conditioned by insufficient coverage in domestic works of modern psychological aspects of the existence of social networks. The practical significance of the work lies in particular in that it highlights the psychological aspects of applied technology in promotion companies, brands, products, services and markets; their specificity in terms of psychological science.