Matroska, commonly known as MKV, is a multimedia container format that allows for the storage of various types of media files such as video, audio, and subtitles. It is an open standard and free container format that supports high-quality audio and video playback.

One of the key advantages of MKV is its ability to hold multiple audio and subtitle tracks within a single file, making it ideal for movies and TV shows with multiple language options. It also supports advanced features like chapter navigation, metadata, and menus.

With its flexible and extensible nature, MKV has gained popularity among users and is widely supported by media players and devices across different platforms.