A Data Warehouse (DWH) is a type of database that is used to store large amounts of data from multiple sources. It is designed to enable the efficient analysis of data from different perspectives and can be used to support decision-making. It is a collection of integrated data from multiple sources, which is stored in a single, centralized repository. The data is typically organized in a way that allows for efficient analysis and reporting. It is used to support data-driven decision-making and to provide insights into business operations. It can also be used to store historical data, which can be used to track trends and patterns over time. A DWH can be used to support data-driven decision-making by providing access to data from multiple sources, allowing for more comprehensive analysis. Additionally, it can be used to provide insights into customer behavior, which can be used to improve customer service and increase customer loyalty.