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Audio description, also known as video description or described video, is a narration track that is added to a film, television program, or live performance to provide information about the visual elements of the content. This narration is typically delivered during pauses in the dialogue, offering details about actions, settings, characters, costumes, and on-screen text that might otherwise be missed by a visually impaired audience.

The primary purpose of audio description is to make visual media more accessible to people who are blind or have low vision. It aims to provide a richer and more complete understanding of the narrative and visual storytelling. The descriptive narration is usually pre-recorded and can be accessed through a separate audio track, often available via the television's closed captioning menu or through dedicated audio description services.

The development of audio description began in the late 1970s, with early experiments and pilot programs. Over the decades, it has become a standard feature in many countries, often mandated by law for broadcast television and increasingly implemented in streaming services and live theatrical performances. The quality of audio description can vary, with professional services employing trained describers who aim for clarity, accuracy, and conciseness. The content of the description focuses on conveying essential visual information without over-explaining or interrupting the natural flow of the program.