Okay kiddo, have you ever seen a police officer holding a big plastic shield in front of them during a protest or a dangerous situation? That's called a riot shield!
The riot shield is made of a strong and sturdy material that can protect the police officer behind it from being hurt by objects like rocks, bottles, or other things that could be thrown at them.
The shield is also very big, so it can cover most of the police officer's body, keeping them safe. It can be used to block people from getting too close to them or for the police officer to push someone back if they are being aggressive.
Some riot shields even have a clear piece at the top so the officer can still see what's going on around them without having to move the shield all the time.
Overall, the riot shield is an important tool for police officers to protect themselves and keep everyone safe in dangerous situations.