What is the primary purpose of a data catalog?

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A data catalog is a metadata-driven hub that makes data assets visible and understandable across the organization. Its main purpose is to inventory data assets, describe their meaning, lineage, and usage, and help users discover data. By capturing definitions, owners, data types, and business context, along with where data comes from and how it’s transformed, a catalog provides searchable, contextual insight that speeds discovery and fosters trust. This supports data governance by making assets discoverable, explainable, and usable, helping analysts choose the right data for analyses and ensuring consistent understanding across teams. The idea isn’t to store raw data or to enforce security in isolation or to replace governance programs; it’s to provide the metadata and discovery layer that underpins effective governance and data literacy.