This document provides an overview of 3D on the web (3D internet). It discusses what 3D internet is, the applications and importance of 3D content on the web, the history and current status. Key enablers for 3D on the web have been increased bandwidth and computer processing power. 3D can be used for e-commerce, training, games, entertainment, social interaction, and education. The document also discusses technologies, design, animation, interactivity, and content creation for 3D on the web. A simple example of a 3D forest walk site is provided to illustrate how easy it can be to create basic 3D web content.