Politics. Undue influence, in contract law, where one person takes advantage of a position of power over another person. Sphere of influence, in political science, an area over which a state or organization has some indirect control. Political journalism aims to provide voters with the information to formulate their own opinion and participate in community, local or national matters that will affect them. Mass media means technology that is intended to reach a mass audience. It is the primary means of communication used to reach the vast majority of the general public. The most common platforms for mass media are newspapers, magazines, radio, television, and the Internet. Social media is changing the nature of political communication because they are tools that can be used to inform and mobilize users in new ways. Users are able to connect directly to politicians and campaign managers and engage in political activities in new ways. The four functions of mass communications are: surveillance, correlation, cultural transmission and entertainment. In many ways, the four functions of mass communication are still relevant and transferable to contemporary media.