This document provides an overview of how to build intelligent applications by connecting to the Microsoft Graph. It discusses how the Microsoft Graph acts as a gateway to all user and organization data in Microsoft cloud services. It then covers getting started with the Graph including exploring it using tools like the Graph Explorer, SDKs for .NET and JavaScript, and PowerShell. The document demonstrates how to perform common operations on the Graph like getting, creating, updating and deleting data. It also covers advanced scenarios like batching requests, subscriptions, and extensions. Best practices are discussed around optimizations like projections, filters and pagination. Finally, resources for learning more are provided.