A diplomat is a person whose job is to represent their country in other countries. They are like messengers between countries, and their jobs are to help countries communicate with each other, solve problems together, and make agreements that are good for both countries.
Imagine that you and your friend had a fight and you both want to talk about it and find a way to solve the problem. Your parents might be like diplomats and help you both talk to each other, understand each other's point of view, and come up with a solution that makes you both happy. Diplomats do the same thing, but at a much bigger scale, between countries. They help countries talk to each other, understand each other's issues, and come up with solutions that are beneficial for both countries.
Diplomats are very important because they can help prevent wars between countries. If countries have problems with each other, instead of fighting, they can talk to each other through diplomats and find a way to solve the problem without violence. Diplomats have to be good at communicating, listening, and understanding different cultures and ways of life. They also have to be very patient and not get angry or upset easily because sometimes countries can have very different ideas and opinions.
Overall, diplomats are like helpers for countries. They help countries come together, understand each other, and make agreements that are good for everyone.