Political communication is the study of political messaging, e.g. in political campaigns, speeches and political advertising, often within the mass media. It is an interdisciplinary subfield located between communication studies and political science. Political communication is concerned with ideas such as information flow, political influence, policy making, news, and public opinion. The field also focuses on the study of political social media, propaganda, political economy of communication and non-profit organisations that communicate to affect political processes. Modern societal changes that have affected the field include the digitization of media, polarization and a movement towards a post-truth media environment.