This document discusses 3D internet and its advantages and applications. 3D internet combines 3D graphics with the internet, allowing for interactive and real-time 3D graphics delivered over the web. It provides benefits like interesting 3D shopping experiences and easier social interactions. Examples of 3D internet applications include 3D virtual shops for e-commerce, virtual experiments for science education, and multiplayer 3D games for entertainment. The document also notes some disadvantages like the need for high internet speeds and challenges viewing 3D on 2D displays.