Well kiddo, do you know what a secret is? It's something that you don't tell anyone else, right? Well, banks have something called bank secrecy. This means that they keep your money and information about your money safe and private, just like a secret.
When you give your money to a bank, they share some of your information with the government so they can make sure everything is legal and ok. But, they don't share all your information with anyone else, like your friends or family. They also have special people who work at the bank whose job is to keep all your information protected and secure from bad people who might try to steal it.
Bank secrecy helps you feel safe and makes sure your money is being protected. But, sometimes bad people use bank secrecy to do bad things, like hide money they got illegally or to avoid paying taxes. That's why there are rules that make sure banks don't help people do things that are not legal.
So, even though bank secrecy can be a little confusing, it's important for keeping your money safe and making sure everything is fair and legal for everyone.