Virtual worlds are computer-simulated 3D environments that allow multiple users to interact as avatars, highlighting their importance for social interaction and communication. The document traces the history of communication technologies leading to the emergence of virtual worlds and their significant growth in user engagement and technological advancements since the late 1990s. With predictions of their increasing relevance in work within five years, the text emphasizes the need to demonstrate their value beyond gaming to ensure broader acceptance and integration into society.