Corruption is when people do things that are wrong or bad to get power or money. In Iran, sometimes people who work for the government or are in charge of things can be corrupt. They might take money from people who want to do business, or take things that they are not supposed to have, like someone else's land. This is really bad because it hurts other people and can make it hard for everyone to get what they need. The government in Iran is trying to stop corruption, but it is not always easy.