Propaganda is a form of communication that is aimed at influencing the attitude of a community toward some cause or position so as to benefit oneself or one's group.
As opposed to impartially providing information, propaganda, in its most basic sense, presents information primarily to influence an audience. Propaganda is often biased, with facts selectively presented (thus possibly lying by omission) to encourage a particular synthesis, or uses loaded messages to produce an emotional rather than rational response to the information presented. The desired result is a change of the attitude toward the subject in the target audience to further a political, or other type of agenda. Propaganda can be used as a form of political warfare.