Okay kiddo, have you ever seen grown-ups counting money at the bank or the store? They use a machine called a banknote counter.
This machine is like a magical box that counts all the banknotes for you. You just put the banknotes in the machine, and it uses special technology to count them.
The machine has a little gate where you put the banknotes in one at a time. The machine uses light sensors to check what kind of banknote it is, and it adds up how much the banknote is worth.
Then, the machine displays the total amount of money on a screen. You can also print a receipt that shows how much money you put in.
So, the banknote counter is a helpful machine that makes it easy and quick to count lots of money. It's very important for banks and stores to have one so they can keep track of how much money they have.