Okay kiddo, so you know how there are some mean people in the world who do bad things to others? Well, a group of these bad people is called a gang.
There is a gang called the Snakeheads. They are a group of criminals who are known for helping people illegally get into other countries.
Sometimes, people want to move to a different country for a better life, but they don't have the right papers to do it legally. So the Snakeheads offer to help them for a lot of money.
But, they do it in secret and in a dangerous way. They hide people in trucks or boats and try to sneak them past border control. This is very dangerous because sometimes people can get hurt or even die while trying to hide like this.
The Snakeheads make a lot of money doing this, but it's not a nice thing to do. They're breaking the law and putting people in danger. It's always better to do things the right way and follow the rules.