The research examines the Effectiveness of Social Media in News Gathering and Dissemination: A study of TVC, Lagos. The proliferation of information communication technology such as the internet has made it possible to find out about events without actually being there. Journalists can report news across the world over the internet. Throughout history, developments in technology and communication have gone hand-in-hand, and the latest technological developments such as the internet have resulted in the advancement of the science of communication to a new level. The process of human communication has evolved over the years, with many path-breaking inventions and discoveries heralding revolutions. The invention of pictographs or the first written communication in the ancient world brought about written communication. These writings were on stone, and remained immobile. To achieve this aim, a critical review to related literature was made. Relevant theory which was used to mediamophosis and technological determinism. Quantitative research design was used in which cross-sectional survey method was adopted while the data collection instrument was questionnaire. Subjects were drawn from journalists in Lagos metropolis particularly with TVC Lagos, using purposive sampling technique. Findings showed that social media have enhanced the productivity of journalists in Lagos state and a great number of journalists use them to source for news among other things. It is recommended that journalists should be careful in using stories generated via social media because the platform lack gatekeepers.