When a pilot taxis to the stand, he must maintain the airport order and act according to the rules. The person who communicates with pilot then is called the Marshaller: he assists in turning, slowing down, stopping and shutting down the engines - after all, the plane is quite a large machine and there are no rear mirrors like in the cars. Sometimes they indicate directions by driving the "follow-me" car, but you usually see them at the airport when they signal things with their arms.
We will teach you how to do it!