This document is a technical seminar submission on 3D Internet in Web 3.0 presented to JNTU Hyderabad for a Bachelor of Technology degree. It introduces the concepts of Web 1.0, 2.0 and 3.0, with Web 3.0 proposed to integrate data across applications and connect various devices. 3D Internet, also known as virtual worlds, is described as an interactive and engaging experience that can be used for meetings, training, education and more. Examples like Second Life are provided. Technical implications around speed and hardware are discussed, as well as potential solutions and applications of 3D Internet in fields like education, religion and entertainment.