Scrolling is when you move things up and down on a screen with your finger or mouse. It's kinda like when you turn the pages of a book, but on a computer or phone. When you want to see more of something that doesn't fit on the screen, you just move your finger or mouse to scroll it up or down to the place where you can see what you want. It's like magic! And it helps you see more stuff on your screen without making everything look teeny tiny.