So imagine you and your friends are playing a game and there's one person who is responsible for making sure everyone is following the rules. They're like the boss of the game, right?
Well, in the big game of the United States government, the comptroller general is kind of like that boss. Their job is to make sure that the government is following all the rules and doing things the right way.
They work for an organization called the Government Accountability Office (GAO) which looks at how the government is spending money and making decisions.
The comptroller general makes reports and gives advice to the Congress and the President about how to improve the way the government works. They also help make sure that the government is being responsible with people's tax money.
So basically, the comptroller general is like the boss of the government who makes sure everyone is playing by the rules and doing things the right way.