A scroll heatmap is a visual representation of how users interact with a webpage by tracking their scrolling behavior. It uses color-coded data to show which parts of the page are most frequently viewed and how far users scroll down. This tool provides valuable insights into user engagement and can help website owners optimize their content and layout for maximum impact. By analyzing a scroll heatmap, businesses can identify which sections of their webpage are most effective in capturing and retaining the attention of their audience.