This document provides an introduction to mass communication. It defines mass communication as public communication transmitted electronically or mechanically to large audiences. Mass communication uses various mass media like newspapers, magazines, films, radio, television and the internet to transmit messages to national and international audiences. The key functions of mass media are to inform, educate and entertain audiences. Mass communication originated with improvements in transportation and technology that allowed faster dissemination of information over long distances to more people. Traditional forms of mass media included newspapers, radio and television.