Propaganda: is when a company or an organization try to show you how they are the best. and they always offer you what you want and need. they will try to persuade you(do what they want you to do). note that propaganda could be thoughts not only products.
Let's see some examples of thoughts that propagantist want to persuade you with:
you see here the african people shown as servant to white people. which becaome later a sterotype of african that they in a lower level than white people.
Here United State government wants people to do their best to fight in the war. And the message says that it's citizens’ responsibility to defense their country.