Amazon QuickSight is a business intelligence service that allows users to connect to data sources, create interactive dashboards, and securely share them across organizations. It offers auto-scaling, high availability, integration with AWS services, and pay-per-use pricing starting at $5/month for readers. QuickSight provides machine learning capabilities like anomaly detection and forecasting. It also allows embedding dashboards in applications. Customers like Capital One, Comcast, and the NFL use QuickSight for self-service analytics, embedded analytics, and delivering insights to large numbers of users through its reader role and usage-based pricing.