Network security policy is like the rules you have to follow when you play with toys. Just like how you don't throw toys or break them, you also have to be very careful when using computers and the internet. When people use computers and the internet, they have to follow certain rules too so that they don't accidentally do something bad or hurtful.
Network security policy is like a big list of important rules that everyone who uses a computer and the internet has to follow. It tells people how to keep their information and data safe, how to protect against viruses and hackers, and what to do if something goes wrong.
Just like how mommy and daddy make rules to keep you safe, network security policy helps keep all the people and companies that use computers and the internet safe too. Everyone has to follow these rules so that nobody gets hurt, and all our important information stays safe and secure.