This document introduces Silverlight and provides an overview of what it is, how to create Silverlight applications, and demos of using Visual Studio and Expression Blend to build Silverlight content. Silverlight is a plugin that renders XAML-based user interfaces in a browser. It offers a flexible programming model and supports rich media experiences. The document demonstrates how to easily create Silverlight applications using Visual Studio or Expression tools and provides examples of additional capabilities like integrating user input and web services.