This chapter explores the transformative journey of the metaverse concept from its literary roots in Neal Stephenson’s Snow Crash to its recent prominence within the tech industry, particularly through the lens of the Web3 paradigm. It delves into the role of three pivotal communities in shaping the Web3 metaverse: the Web3 Community, which leverages blockchain for decentralized asset management; the Crowd Intelligence Community, focused on democratizing content creation through platforms like Roblox; and the Immersive Convergence Community, aiming to enhance user experience through advanced technologies like VR and AR. The chapter also examines the integration of blockchain technology into the metaverse, highlighting the evolution from simple ledgers to complex decentralized applications (dApps), and discusses the economic dynamics that fuel this digital world. Furthermore, it addresses the challenges of interoperability between parallel metaverses, the anti-monopoly ethos driving the decentralized movement, and the economic fluctuations affecting the metaverse economy. Lastly, it outlines future research directions in achieving interoperability, emphasizing the use of knowledge graphs and decentralized knowledge inference to bridge data and foster collaboration across different metaverses.