This document discusses gatekeeping in media. It begins by introducing the presenters and outlining the contents to be covered, including introductions to gatekeeping, gatekeepers, the history of gatekeeping theory, types of gatekeeping, and factors that influence the gatekeeping process. It then provides definitions of gatekeeping as the filtering of information by individuals or groups to determine what gets published. It also defines gatekeepers as those in charge of this filtering process. The document outlines several scholars' views on gatekeeping and discusses the core assumptions, functions, benefits, criticisms, and applications of gatekeeping theory.