The function of a data warehouse in business intelligence is to store, consolidate, and manage data from various sources for analysis and reporting purposes. Data warehouses facilitate complex queries and help organizations create informative dashboards, reports, and visualizations that assist in decision-making. By structuring and organizing data in a way that optimizes retrieval, a data warehouse enables businesses to gain insights into trends, patterns, and performance metrics. This centralized repository supports data analysis workflow, helping organizations transform raw data into meaningful information that drives strategic planning and operational improvements.