Tableau is a business intelligence tool that allows users to visually analyze data through interactive dashboards and charts. It provides features such as self-service analytics, visual data discovery, centralized data storage, and real-time collaboration. Tableau uses a drag-and-drop interface so that users can easily visualize data, explore different views, and combine multiple databases without any complex scripting. Demand for Tableau experts is growing as more companies adopt the platform for data analysis and sharing insights.