WebVTT (Web Video Text Tracks) is a text-based file format used for displaying timed text tracks (such as subtitles, captions, descriptions, chapter titles, and metadata) during video playback. It's designed to be used with the HTML5 `<video>` element. VTT files are plain text files that contain cues, each consisting of a start time, an end time, and the text to be displayed. The format supports styling options, allowing for customization of the appearance of the text. WebVTT is an open standard and is widely supported by modern web browsers and video players. It's a crucial component for making video content accessible to a wider audience, including those who are deaf or hard of hearing, and for providing translations or additional information to viewers. The format is designed to be relatively simple to create and edit, making it a popular choice for adding subtitles and captions to online videos. It's also used for creating timed metadata tracks, which can be used to trigger events or display information during video playback.