Inventory control is like making sure you have everything you need to play with your toys, but for grown-ups who run stores or companies.
Imagine you have a toy box with lots of toys inside. You love playing with your toys and sometimes you take them out of the box, but sometimes you forget to put them back in. If your mom or dad doesn't check the toy box regularly, you might run out of toys to play with, or worse, lose some of them! This is why they have to keep track of your toys and make sure everything is in the toy box.
Companies have the same problem. They have a lot of products or items in their store or warehouse, and they need to make sure they have enough of them to sell to customers. If they don't have enough, customers might get mad and go somewhere else to buy what they want. But if they have too much, they might waste money on products that won't sell.
So, just like your parents keep track of your toys, companies have something called an inventory control system. This is like a big list that tells them what they have in their store or warehouse, how much of each item they have, and when they need to order more. They use this list to make sure they always have enough products to sell, but not too much.
Inventory control can be tricky, but it's important because it helps companies save money and keep their customers happy. Just like how your parents make sure you always have toys to play with, businesses need to make sure they always have products to sell.