Propaganda is a form of communication to distribute information. It is usually biased. The information is designed to make people feel a certain way or to believe a certain thing. The information is often political.
It is hard to tell whether the information is true or false. Very often, the information is confusing and unfair. Propaganda does tend to make disputes last longer, and be more difficult to resolve. It can take the form of posters, TV advertisements, and radio announcements.