Scroll animation is a web design technique that creates dynamic visual effects as users scroll down a webpage. This can include elements that fade in, move, or change size, enhancing user engagement and storytelling. It often uses JavaScript and CSS to trigger animations based on the user's scroll position. This technique is commonly used in modern websites to make content more interactive and visually appealing. By incorporating parallax scrolling, where background images move at a different speed than foreground content, designers can create a sense of depth. Overall, scroll animation helps guide users through the content in a more immersive way.