Propaganda has been an effective tool to shape public opinion and action for centuries. Since propaganda and public relations both share the goal of using mass communication to influence public perception, it can be easy to conflate the two. Propaganda, however, traffics in lies, misinformation, inflammatory language, and other negative communication to achieve an objective related to a cause, goal or political agenda.these common techniques are used to manipulate others to act or respond in the way that the propagandist desires.