MongoDB on Windows Azure` is a highly scalable and flexible NoSQL database solution that stores data in `BSON` objects, making it easy to learn for developers with `JavaScript` experience. It offers features such as replication architecture, sharding capabilities, and high availability, making it suitable for building high-availability web applications or services. The `MongoDB Installer for Windows Azure` streamlines the setup, deployment, and development experience, allowing users to easily get started with MongoDB on Windows Azure. Additionally, MongoDB supports a wide range of programming languages, including `PHP`, `Node.js`, and `.NET`, making it a popular choice among developers.