Imagine that you have a special toy chest in your bedroom. The toy chest has lots of fun toys inside, and you only want to share them with your friends. You can use CORS to specify which friends are allowed to play with the toys in your toy chest.
For example, you might want to allow your best friend to play with the toys in your toy chest, but not your little brother. CORS helps you to control who is allowed to access the toys in your toy chest.
This is like having a special lock on the toy chest that only opens for your friends who have been given a special key. CORS helps to keep your website's resources safe and private, just like how a toy chest helps you to keep your toys organized and safe.