This document discusses key concepts from Marxist theory as it relates to media and ideology. It covers neo-Marxist thinkers like Gramsci, Althusser, the Frankfurt School, and Stuart Hall. Some main points are that Marxists see the media as reproducing the dominant ideology to maintain the status quo, but thinkers like Hall allow for more negotiation and oppositional readings by media audiences. The document also discusses concentration of media ownership.