Why are forms of political communication (bias/propaganda) both harmful and useful? Pls help!!!

First, what is propaganda? When is propaganda most used, and why? How can I tell the difference between harmful, or beneficial propaganda?

Explanation:

1.) Propaganda: Information, especially of a biased or misleading nature, used to promote or publicize a particualr political cause or point of view.

In simple terms- Changing ones opioion, point of belief or view with misleading, and untrustworthy word.

2.) Propaganda is most commonly seen durning war, protests, political debates, and social controversies and difficulties. Meaning, when it pretains to public appeal, or in other terms, when the people are to choose. ( Like, in America. Propaganda, is used durning Presidential elections.)

3.) It can be very hard to tell the difference. However, propaganda, is built upon lies and misleading information. So, fact check. This way, you can see whether or not you are being misled. Most importantly, don't let what you see, read, or hear sway your ideas and beliefs on someone or something

Harmful- easy to sway the publics' ideas and opinions through catchphrases, pictures, fake news, lies, and the agreement of popular social figures.  Easy to paint any picture.

Ex." Loose Lips, Might Sink Ships"

This is harmful propaganda, as it is threatening those who see it.

Beneficial- Encourages morale, promote a better enviorment. Is not asking you to do something for personal gain of another. Encourages overall.  

Ex. "Rosie The Riveter"

Rosie was a powerful woman figure during World War II,  used to improve the morale of women to work in factories, in order to keep up the economy, money, and agriculture, while men were in the battle.  A strong female character who encouraged women to work in war production, their patriotic duty was to save America at the time.

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explanation:

the population grew a lot and was making more money