Okay, so imagine you're in a toy store and you want to buy a toy. You go to the checkout counter and there's a long line of other kids waiting to pay for their toys too. That's kind of like how the internet works, with lots of people trying to use it at the same time.
Now, imagine the store hires more cashiers to help speed up the checkout process. That's like high-speed downlink packet access (HSDPA) working to make the internet faster for you. It helps your phone or computer download things from the internet like videos or pictures really quickly, even if there are a lot of other people trying to use the internet at the same time.
HSDPA stands for high-speed downlink packet access, and it's a technology that helps cell phone networks transfer data faster. This means that if you're trying to download a movie or a game, it will be able to transfer to your phone or tablet much faster, making it easier for you to enjoy without any annoying delays.