What role does metadata play in library information systems?

Metadata plays a crucial role in library information systems by describing and providing information about a resource. This includes details such as the title, author, publication date, subject matter, and even the format of the resource. By giving context and organization to the materials within a library's collection, metadata enables effective search and retrieval of resources. It helps both librarians and patrons locate the necessary information efficiently, facilitating better access to the materials.

The presence of accurate and comprehensive metadata is essential for cataloging systems, enhancing discoverability, and supporting resource management. This is especially important in digital libraries where the amounts of data can be vast. The other answer choices do not accurately reflect the primary function of metadata, which centers on the description and organization of resources rather than physical storage solutions, checkout processes, or backup systems.