Okay kiddo, let me explain bandwidth extension in a way that you'll understand.
Think of your computer like a straw, and the internet like a drink. Your straw can only hold so much liquid (data) at once, just like your computer can only handle a certain amount of internet traffic (bandwidth).
But what if you wanted to drink a lot more of your delicious drink? You could use a bigger straw, right? Well, that's kind of like bandwidth extension!
By increasing the size of the "straw" (bandwidth), you're able to handle more data at once, which means you can access more information on the internet, stream videos faster, and download files more quickly.
It’s like if you were building a road. You start with a one-lane road which means only one car can go through at a time. But if you add a second lane, now two cars can go through and it's faster for everyone. That's what bandwidth extension does to the internet – it adds more lanes to the road so that more information can get through faster.
Bandwidth extension is like making your straw bigger or adding more lanes to a road, so you can handle more data and get things done more quickly on the internet.