The document discusses 3D internet or virtual worlds, which combine 3D graphics with the internet. 3D internet allows for an interactive, real-time 3D experience delivered over the web. It can be used as a powerful new way to reach customers, partners, students, etc. through 3D representations instead of just words. While early versions had limitations like being less interactive and having privacy/security issues, 3D internet now offers advantages like interesting 3D shopping and easier social interactions. It works by using virtual platforms, AI, 3D devices, and sensors to coordinate user avatars and environments across servers and networks.