The document provides an overview of 3D web technologies including Second Life. It discusses 3D web browsers, avatars, simulations (SIMs), prims, and new users (newbies). It demonstrates how to perform basic actions like moving, flying, teleporting, and talking in a virtual 3D environment. Examples are given of real-world applications for 3D worlds including virtual meetings and conferences. Links are included to examples of 3D web platforms.