The document provides an overview and introduction to ASP.NET Web API in 30 minutes. It discusses key concepts like using HTTP methods and URIs to build HTTP services that can reach a broad range of clients. ASP.NET Web API uses common concepts from ASP.NET MVC like controllers, routing, models and validation. It also supports features like asynchronous programming, OData, and self-hosting. The presentation includes two demo examples, one for comment management and another using client and server in memory.