Agenda-setting is a theory in communication and political science that suggests that the media plays a significant role in influencing the public's perception of what topics are important and deserve attention. The theory posits that the media has the power to shape the public agenda by deciding which issues to cover and how prominently to cover them. By framing the news in a certain way and giving more coverage to certain topics, the media can influence what people think about and prioritize in their lives. Agenda-setting research seeks to understand how this process occurs, the effects it has on public opinion and policy-making, and the role of other factors, such as audience characteristics and political context, in shaping the agenda.