Public reason is when people talk and make decisions together about important things that affect everyone. It's kind of like when you and your friends are trying to decide what game to play, but on a much bigger scale. It's important because not everyone thinks the same way or believes the same things, so talking together helps people understand each other's ideas and come up with a decision that everyone can agree on.
In order to have a good public reason conversation, people need to be respectful and listen to each other. Just like how you should listen to your friend's ideas about what game to play, even if you don't agree with them. People also need to use good reasons to support their ideas. This means explaining why they think something is a good idea using evidence or examples.
Public reason is used in many important decisions, like when governments make laws or when schools decide on their rules. It's a way to make sure that everyone's ideas are heard and that decisions are made in a fair way.