A container format is a file format that can hold multiple types of data in a single file. This data can include video, audio, subtitles, and metadata, allowing for efficient storage and playback. Common examples of container formats include MP4, AVI, and MKV. Each format has its own advantages, such as compatibility with different devices and software. Container formats are essential for media distribution, as they enable seamless playback across various platforms. They help ensure that all components of a media file are synchronized and can be easily accessed by media players. Understanding container formats is crucial for anyone working with digital media.