An M3U URL is a web address that points to an M3U file. M3U URLs are commonly used in IPTV (Internet Protocol Television) to provide a playlist of media content. When you have an M3U URL, you can use it to access and stream the media files listed in the playlist. The M3U URL can be accessed through a compatible media player or IPTV app that supports M3U playlists. By entering or pasting the M3U URL into the player or app, it retrieves the playlist and allows you to play the media content directly from the provided URL.