The Central Bank of Iran is like a grown-up's piggy bank, but for the whole country. Just like you have a piggy bank to store your money, the Central Bank of Iran stores all the money of the entire country, and helps the government manage it.
The Central Bank of Iran is in charge of making sure that there is enough money for everyone to use, and that nobody cheats or steals money from others. Just like your parents give you allowance or pocket money, the Central Bank of Iran gives money to the government to help pay for important things like hospitals, schools and roads.
They also make sure that the money in Iran is the right value, and that people can use it easily to buy and sell things. They keep a close watch on how much money is coming in and going out of the country, and make sure that everything is running smoothly.
In short, the Central Bank of Iran is like the big boss of all the money in Iran, and they work hard to make sure that everyone can use it properly!