This document provides an overview of Google App Engine, a platform for hosting web applications on Google's infrastructure. It discusses the basics of cloud computing, how App Engine compares to other platforms like Amazon EC2 and Rackspace, and the technology stack and limitations of developing applications on App Engine, including its use of Python and Java, databases like BigTable, and pricing and administration tools. It concludes by recommending giving App Engine a try and provides some example applications and additional resources.