"Facebook - 2019-2020" is a book that reveals important aspects of the social network phenomenon as a tool of influence in the modern world. The author examines the history of the formation and development of the Facebook social platform, reveals the complexity of its algorithms and operating principles. The book examines the impact of Facebook on society, politics, economy and culture, and also analyzes the ethical and security issues related to its operation. The reader will have the opportunity to gain an in-depth understanding of the role of social networks in our lives, revealing the intricacies of media influence on mass consciousness. The book "Facebook - 2019-2020" will help you understand the essence of communication processes in the modern information society and overcome artificially created barriers to the development of your own critical thinking.