The corporate media is media which is controlled by corporations and profit-oriented monied interests. It is part of a larger category called bourgeois media, which can also include state media of imperialist countries.
Corporate media tends to be pro-war, anti-democracy, and anti-populist. They frequently accuse all populist movements of being "fascist" much in the same way that the CIA-backed Synthetic Left was able to conflate populist Soviet communism with the fascism of the mid-1900s.