What is metadata?

Metadata refers to data that provides information about other data, enhancing its understanding and usability. For example, metadata can include details such as the author of a document, the date it was created, the file type, and descriptions that help classify content. In the case of closed captions on Internet TV, they serve as a form of metadata by describing or explaining the audio content, making it accessible to a wider audience. This additional layer of information is crucial for organizing, managing, and retrieving data effectively.

The other options represent concepts that are distinct from metadata. A file format for video compression pertains to how video files are encoded, while an encryption method focuses on securing data for privacy. Additionally, a type of database management system relates to software used for creating and managing databases, which is separate from the concept of metadata itself. Therefore, the first option accurately captures the essence of what metadata is.