Ideological criticism refers to a set of ideas that gives a particular account of the world, and those ideas are usually selective and seem natural and obvious (hello, hegemony!). This process studies how ideas reflect and serve interests of elites and how the ideas go largely unnoticed and unchallenged. It differs from other approaches because it’s just not looking at a text like semiotics does, but it looks at who produces it, how it’s structured and how a text interacts with life experiences.
Ideological criticism emphasizes value in understanding how media texts establish and sustain existing power relations and expose and challenge dominant ideas and values, even though such a concept can be confrontational (hello, counterhegemony!).