Charge control is like the battery boss. It makes sure your battery doesn't get too full or too empty. Just like how you have to eat your food at the right time, your battery also needs the right amount of charge.
When you charge your phone or tablet, charge control makes sure that the battery doesn't get too full, otherwise it may overheat and cause damage. This is why you see a percentage number on your screen telling you how much charge is left so you don't overcharge it.
Similarly, when you use your device, charge control keeps an eye on how much power it is using and ensures your battery doesn't get too empty otherwise it may stop working altogether.
So, charge control is like a battery babysitter, making sure your battery stays happy, healthy and ready for when you need it!