Scroll-driven storytelling with progressive content reveal, parallax layers, scroll-snapping sections, scroll-triggered animations, and progress indicators. Major 2023-2024 engagement trend. Content unfolds as user scrolls — each section reveals new information with visual transitions. Uses IntersectionObserver, CSS scroll-snap, scroll-linked animations. Perfect for product landing pages, case studies, annual reports, brand stories, one-pagers, portfolios. ALWAYS combine with 11-responsive-premium and 12-deployment-paths skills.