What are propaganda posters?

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What are propaganda posters?

Wiki: http://en.wikipedia.org/wiki/Propaganda

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.

While the term propaganda has acquired a strongly negative connotation by association with its most manipulative and jingoistic examples, propaganda in its original sense was neutral, and could refer to uses that were generally benign or innocuous, such as public health recommendations, signs encouraging citizens to participate in a census or election, or messages encouraging persons to report crimes to the police, among others.

Propaganda is a way of communication to a group of people to hopefully change their attitude towards the cause, for example one of the posters above shows indirectly that by carelessly talking you can cost lives. A lot of propaganda is biased towards the given subject, information is used carefully and in specify ways to influence the audience into believing it. Propaganda posters are designed to get an emotion response from the audience rather than a more conventional approach such as getting a rational response. Overall, propaganda is used to change the opinion of the audience.