So, you know how in school, you learn about different subjects like math, reading, and science?
Well, business schools are kind of like that, but instead of learning about those subjects, you learn about how to run a business.
That means you learn things like how to make a budget (which is like a plan for how to spend money), how to sell things, how to hire people, and how to make a profit (which is when you make more money than you spend).
People go to business school because they want to be really good at running a business, like owning their own store or starting their own company.
They also learn how to work with other people and how to be a leader, which means helping other people do a good job too.
It's like learning how to be a boss, but in a nice way!