This book is a comprehensive study of issues related to the characteristics and role of Internet social networks in the life of modern society. The object of the study was examined using the tools of sociology, political science, psychology, methods of statistical analysis and mathematical modeling. Many real situations from world practice were analyzed, as well as from the author’s personal professional experience. Data from sociological studies that have not previously been published anywhere, including those by foreign scientists, are presented. Particular attention is paid to the analysis of technologies for manipulating individual and group opinions in online social networks, which are actively used in socio-political practice. For specialists in the field of “new media” and public relations, journalists, managers, as well as for all readers interested in the issues of social networks Internet.