Data warehouse is a centralized repository designed to store and manage large volumes of structured data from various sources. Data warehouses are optimized for query and analysis, allowing organizations to consolidate data, perform complex queries, and generate reports. They support business intelligence activities by providing a stable, consistent, and high-performance environment for data analysis. Data is typically cleaned, transformed, and organized into schemas in a data warehouse, facilitating efficient data retrieval and insightful analysis to aid in strategic decision-making.