A cracker is someone who tries to gain access to a digital system, like a computer or a phone, without permission. They use their computer skills to figure out ways to sneak into the system and get information or cause trouble.
It's like when someone tries to sneak into your room without your permission. They might try to unlock the door or climb through a window, just like how a cracker might try to find a way to break into a digital system.
Crackers are not good because they can steal your personal information, like passwords or bank account details, or cause damage to your computer or phone. It's important to keep your digital devices safe by using strong passwords and not sharing them with anyone.