Envoy is like a messenger who helps different people talk to each other. Let's say you live in one country and you want to talk to someone who lives in another country. But you don't speak the same language, so you need someone who can help translate for you. That's where the envoy comes in. They can help talk to the person in the other country, and make sure everything is understood by both of you.
But envoy is not just a person who talks. They also help make sure that everything is done in a safe and fair way. They make sure that nobody cheats or lies, and that both sides are happy with what's happening. Envoy can also make sure that everyone follows the rules, like when you're playing a game with your friends.
So, envoy is like a messenger, translator, and referee all in one. They help different people talk to each other and make sure everything is done fairly and safely.