Okay, so you know how there are people called bishops in some churches, right? They are kind of like the boss or the leader of the group of people who go to that church.
Well, sometimes there are extra special bishops who are in charge of a whole bunch of different churches. They are called primates.
It's kind of like if you were the leader of your family, but then your family was actually part of a bigger group of families, and you were the leader of all of them. That's kind of what a primate bishop does - they are the leader of lots of different churches.
They help make important decisions and give guidance to all the people who go to those churches. So they have a big job, but they also have a lot of support from the people they lead.