A Data Warehouse is a central repository of integrated data from one or more disparate sources, used for reporting and data analysis. Unlike operational databases that handle day-to-day transaction processing, a data warehouse is designed for query and analysis, often containing historical data. It organizes data into a schema, typically using star or snowflake models, to optimize read performance and support complex queries. Data warehouses enable businesses to derive insights from their data, supporting decision-making processes, trend analysis, and business intelligence activities.