Representation refers to how any medium depicts aspects of reality through images, videos, or entire programs. Rather than presenting reality directly, representations re-present things that have already occurred. Representations aim to invite audiences to understand them in preferred ways, though allowing for some interpretation depending on the viewer. Whatever representations are used implicitly convey ideologies, meanings, and values, giving media institutions great power to influence social attitudes through the representations they choose. Stereotypes are exaggerated representations that help audiences instantly understand meanings but are usually negative. Ideologies in media present dominant beliefs and ideas accepted by most in a culture.