This document introduces Azure Cosmos DB, a globally distributed, massively scalable, multi-model database service. It provides global distribution by automatically replicating data across regions around the world. It supports multiple data models and APIs, including key-value, column family, document, and graph. It also offers elastic scale, choice of consistency levels, and guaranteed single-digit millisecond latency with financially-backed SLAs. The document discusses how Azure Cosmos DB powers global solutions for fields like gaming, IoT, and e-commerce by providing scalability, availability, and low latency.