What is propaganda?
Propaganda is information, of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.
How did propaganda affect the people?
Propaganda ensured that the people only got to know what their governments wanted them to know. In WW1, the lengths to which governments would go to in an effort to blacken the enemy’s name reached a new level. To ensure that everybody thought in the way the government wanted, all forms of information were controlled. Newspapers were expected to print what the government wanted the reader to read. Forms included Posters and Newspapers.
Examples of propaganda
The poster on the left is explaining how when the men go out to fight, the women can replace them and do the work that the men should be doing. It is the United War Work Campaign so when it says "Back Our Second Line Of Defense", it is saying that the economy is still going even when men aren't there.
This poster is explaining how women must step up while the men are out there fighting. It says, "Women's Land Army" because of the fact that without men, there is nobody to do the agriculture and the women holding the pitchfork symbolizes that it was their duty to step up and take responsibility of those jobs.