Okay kiddo, so the Eastern Orthodox Church has rules and guidelines that they follow to make sure everything is fair and everyone knows what they're supposed to do. These rules are called canon law.
Canon law covers a lot of things, like how to become a priest or bishop, how to say prayers in church, and even how to get married. It also tells the church what to do if someone breaks the rules, like if a priest does something bad.
The church has been around for a really long time, so they've had a lot of chances to figure out what works and what doesn't. That's why they have all these rules. They want to make sure everyone is treated fairly and that the church runs smoothly.
So even though the rules might seem complicated sometimes, they're actually there to help everyone get along and make sure everything is done the right way.