Okay kiddo, have you ever played with a toy car and a remote control? And when you press buttons on the remote, the car moves however you want it to move?
Well, real cars have something similar but much more complicated. There's a computer inside the car that controls a lot of things like the engine, brakes, and even the radio. And just like how you control your toy car with a remote, there are signals and codes that control the computer in a real car.
Now, some people who are not nice might try to hack into that computer and mess with the signals and codes. They might do this to steal the car, or even worse, to harm the people inside the car.
That's why it's very important for car manufacturers to make sure their cars' computer systems are really difficult to hack. It's also important for car owners to make sure they keep their cars up to date with the latest software updates to protect against any vulnerabilities.