An M3U file is a plain text file that stores a playlist of audio and/or video files. It doesn't contain the actual media data itself; instead, it contains a list of file paths or URLs that point to the media files. Media players use this information to play the listed files in sequence. M3U files are commonly used for creating playlists of songs, internet radio stations, or video clips. They are relatively simple and widely supported across various media players and operating systems. The format is flexible and can include absolute or relative file paths, making it suitable for both local and online media sources. Extended M3U (M3U8) is a variant that supports UTF-8 encoding, allowing for a wider range of characters in the file paths and metadata. M3U files are a convenient way to organize and manage media collections, especially when dealing with large libraries or streaming content.