Imagine you are the king of the land and you want to rule a big empire. But it's too big and you can't take care of everything at once. So you appoint some people to help you govern the different parts of your empire. These people are called Satraps.
In simpler terms, Satraps are like the trusted assistants of a king or emperor who help him govern and manage different parts of his empire. They are responsible for ensuring that the people in their areas are safe, happy and follow the rules laid down by the king.
To do this, Satraps collect taxes, enforce laws and solve disputes. They report to the king and keep him updated about everything that's happening in their area.
Overall, Satraps are like mini-kings, but they work for the big king to keep the empire running smoothly.