Okay kiddo, imagine you and your friends have a secret hideout where you play games and have fun. One day, while you and your friends are playing, a big group of strangers suddenly show up to your hideout.
These strangers are called "dawn raiders", and they are like the police for grown-ups who work in a special area called the stock market. They come in early in the morning when most people are still sleeping, to catch people off guard.
The dawn raiders are looking for clues and evidence that some people might be cheating or doing bad things while playing a grown-up game called "stock trading". This is like a big game where grown-ups buy and sell little pieces of different companies called "shares".
The dawn raiders want to make sure that people who play this game are following the rules and not cheating others. So they show up unexpectedly and search people's homes, offices, and computers, to find any evidence of cheating.
Overall, dawn raids are like surprise visits by detectives who want to make sure that people who play grown-up games are playing fair and being honest. That's why it's important to always play by the rules!