The document discusses key concepts about ideology and how it relates to media. It defines ideology as the set of beliefs or ideas that underpin an institution and influence social relations. Dominant ideologies are those held by ruling or wealthy groups in society and are maintained through hegemony, where the majority accept those values to fit in while minorities stay quiet. The media plays a role in both developing and maintaining dominant ideologies through representations and framing of issues, as well as potentially opposing them by presenting alternatives.