Imagine you are standing on a big balloon that represents our Earth. Now, imagine that you throw a ball around the balloon. You can see that the ball is going around and around in circles. This is kind of like how planets move around the sun.
Now, let's pretend that you are the ball and you are going around the Earth. This is called a geocentric orbit. It means that you are going around and around the Earth in circles.
A geocentric orbit is used to describe the way that some objects in space move around the Earth. It is different from a heliocentric orbit, which is when something is moving around the sun.
So when scientists talk about something having a geocentric orbit, they mean that it is moving around the Earth in circles. It's like a big game of follow the leader, and the Earth is the leader.