This document discusses key concepts relating to audience in media studies. It begins by defining different types of audiences, such as target, mass, niche, and secondary audiences. It then discusses how audience demographics like age, gender, social class can be analyzed. Several audience theories are outlined, including uses and gratifications theory, which discusses how audiences use media to fulfill needs like information, entertainment, and social interaction. Effects theory and its models (hypodermic needle, two-step flow, cultivation) are covered, as well as reception theory and Hall's encoding/decoding model of how audiences can interpret texts in preferred, negotiated, or oppositional ways. Genre theory and its relationship to audience expectations and pleasures is also discussed.