Explain the use of metadata in data warehousing. Discuss the different types of metadata and their roles. Provide examples of how metadata can enhance the usability, maintenance, and performance of a data warehouse.

Metadata plays a critical role in data warehousing as it provides essential information about the data stored in the warehouse, facilitating better understanding, organization, and utilization of data. Metadata is essentially "data about data" and acts as a roadmap for users, developers, and administrators to efficiently manage and retrieve data.

In the context of data warehousing, metadata serves as a bridge between the raw data stored in the system and the business users who analyze it. It helps in understanding the source, structure, transformation process, and lineage of the data. By providing context, metadata improves data governance, traceability, and consistency.

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