Metadata
/ˈmɛtəˌdeɪtə/
noun — "data that describes other data."
Metadata is structured information that provides context, description, or additional attributes about other data. It does not typically contain the primary content itself but conveys essential properties, relationships, and management details that facilitate understanding, organization, retrieval, and processing of the main data. In computing, metadata is widely used in databases, filesystems, web services, multimedia, and distributed systems to enhance data management and interoperability.