Matroska is an open-source multimedia container format that can hold various types of data, including video, audio, subtitles, and metadata. It is designed to be flexible and efficient, allowing for high-quality playback of different media types. The format is commonly used for storing movies and TV shows, often in the MKV file extension. One of the key features of Matroska is its ability to support multiple audio and subtitle tracks within a single file. This makes it popular for users who want to enjoy content in different languages or with various subtitle options. Additionally, Matroska supports advanced features like chapter markers and menu systems, enhancing the viewing experience.