A rolled up piece of paper is a scroll. If you write a poem on a sheet of paper, roll it up, and tie it with a ribbon, you can call it a scroll.
Before books existed, people wrote stories or important information on parchment or papyrus and rolled them into scrolls for easy storage and transport. Sometimes, a scroll would serve as a work of art, a decorated tale that would occasionally be unrolled and displayed. These days, when you scroll through something, you're probably reading it on a computer, moving down the screen.