Okay kiddo, so you know how sometimes when you want to talk to someone who's not with you, you use a phone or a computer? When you do that, you're sending something called communications data. That means the phone or the computer is sending little bits of information back and forth between you and the other person so you can talk or send messages.
Now, communications data is like a type of puzzle. The smallest piece of the puzzle is called a "bit," and it's like a little dot that can either be "on" or "off." Lots of these bits together make up something called a "byte." Bytes are like bigger puzzle pieces that have more information inside them.
When you're talking on the phone or sending messages, all the little bits and bytes of the communications data are traveling through cables or over radio waves to get to the person you're talking to. But sometimes, people might need to look at that communications data to figure things out. Like if there's a crime that happened or something dangerous is going on, the police or other people might need to see the communications data to figure out what happened.
That's when things can get a little tricky. Because sometimes, people might not want others to see what they're saying or doing on their phones or computers. So there are rules about when people can look at communications data, and who's allowed to see it. It's a complicated subject, but it's important to know about so that everyone can stay safe and make sure their communications data is protected.