When a bunch of people want to go outside and say something together, like if they don't think something is fair or want to ask for a change, sometimes they need to get a special piece of paper. That paper is called a protest permit. It's a bit like getting permission from a grown-up to do something you want to do.
It's important to get a protest permit because sometimes when a lot of people are in one place, it can be hard for the police or other grown-ups to keep everyone safe. Having a permit means that the grown-ups can be prepared and make sure everyone is safe.
Getting a protest permit means that the people who want to protest need to talk to the other grown-ups and explain what they want to say and how many people will be there. The grown-ups will ask some questions to make sure the protest will be safe and peaceful.
Then, if everything is okay, the grown-ups will give the people a paper that says they can go outside and say what they want to say. It's like the grown-ups are saying, "I trust you to be good and safe when you're protesting."
So when everyone is outside with their protest signs and saying what they want to say, the grown-ups will be there too to make sure everyone stays safe and nothing bad happens. And because they have the protest permit, everyone can keep protesting until they feel like they've made their point.