This document summarizes key concepts and theories from media studies, covering semiotics, narratology, genre theory, structuralism, postmodernism, representation, identity, feminism, audience reception, and media industries. It outlines important ideas from thinkers such as Roland Barthes, Tzvetan Todorov, Steve Neale, Stuart Hall, David Gauntlett, Judith Butler, Paul Gilroy, Albert Bandura, George Gerbner, Henry Jenkins, and David Hesmondhalgh. The concepts discussed include how meaning is constructed through signs and codes, how narratives and genres function, how identity and representation work, how audiences interpret media, and the political and economic contexts of media production and regulation.