Audio description is a service that provides spoken narration of visual elements in various media, such as movies, television shows, and live performances. It helps individuals who are blind or have low vision understand what is happening on screen or stage by describing actions, settings, and important visual details. The narration is typically delivered through a separate audio track, allowing users to listen to the descriptions while enjoying the original audio. This service enhances accessibility and inclusivity, ensuring that everyone can experience and appreciate the content, regardless of their visual abilities.