An international organization of supreme audit institutions is an organization made up of different groups of people from all over the world. These groups are called "institutions," and they are responsible for keeping an eye on how money is used by governments, businesses, and other organizations. The main job of these institutions is to make sure that the money is being used properly, and that no one is cheating or stealing. They also help improve the way money is managed, so that everyone is treated fairly. The organization works to make sure that everyone follows the same rules and laws when it comes to how money is handled.