Peace makers are people who help solve problems and disagreements between other people, so that everyone can get along and be friends again.
Imagine that you and your friend are playing with a toy, but then you both want to play with it at the same time, and you start arguing and yelling at each other. A peace maker would come over and ask what's going on and why you both want to play with the toy. Then they might suggest that you take turns playing with the toy or find another toy to play with together.
Sometimes people have bigger problems than just toys, like countries disagreeing about something or people fighting over something important. Peace makers can help in those situations too. They listen to both sides and try to come up with a solution that everyone can accept.
It's important to have peace makers because they help make things better and prevent things from getting worse. They teach us how to be patient, respectful, and kind to others, even when we disagree with them.