This book, adhering to the dominant and critical approaches in communication studies, explains new theoretical concepts with examples, their definitions and pioneers. Under the heading of dominant approaches, the language of new media, participatory culture, network society, technological transformation and persuasion technology approaches are defined. In the context of critical approaches, the concepts of simulacrum, digital socialism, online movements, surveillance society, digital labour, digital loneliness, collective intelligence and political economy are explained. In the new terminologies section, the concepts of big data, artificial intelligence, semantic web, digital addiction, mixed reality and digital diseases are given in the context of the concept of virtuality.