Have you ever been to a concert or a parade? There are usually lots of people there, right? When lots of people gather in one place, it can be hard to keep them all safe and make sure everyone can see what is happening.
That's where a crowd control barrier comes in! It's like a fence that is used to keep people in certain areas and make sure they can move safely. Sometimes they are made of metal or plastic and connected together like a puzzle. They might even have little feet to stand up on.
The barrier can be used to create a space for people to stand or sit and watch, like at a concert or sporting event. It can also be used to keep people away from certain areas, like a construction site or a busy street.
So when you see a crowd control barrier, know that it's there to help keep you and others safe and to make sure everyone can enjoy the event without getting hurt or causing chaos.