A Data Warehouse Infrastructure is a system of storing, managing and integrating data from multiple sources to access relevant insights. It is designed to make data more accessible and easier to analyze, so businesses can make more informed decisions. It is characterized by the three-tier architecture—it consists of the database layer for storage, the integration layer for making data available, and the presentation layer for users to view and interact with it. By combining structured and unstructured data from different sources, this infrastructure offers businesses an effective way to gain valuable business intelligence.