3.4 Metaverse The word meta means beginning, important, and consummation. The Metaverse is a mixture of virtual and real worlds. The Web 3.0 architecture provides lower-level support for building Metaverse applications. Immersive interactive technology (e.g., VR, AR, and MR) can create a more attractive digital living space for users. The Metaverse will significantly change the following domains: 1) Education and training. A virtual educational environment facilitates educators ability to teach students. Besides, immersive, interactive learning environments let students better understand knowledge. Recently, Lin et al. provide an overview of Metaverse in education; 2) Entertainment. It seems that Metaverse in the entertainment market (e.g., playing games, watching a movie, and singing) is most successful currently. The digital reality experiences solve the limitations of space and time. Meanwhile, recreational activities can greatly assist students in broadening their intere

It is doubtless that Web 3.0 architecture plays a vital role in data protection. That is, the user can control all aspects of their usage data. Decentralized identity effectively prevents users from identity theft and many cybercrime . For lack of space, we do not list all aspects of Metaverse influences. In brief, the Metaverse will have a disruptive impact on smart cities, social activity, and economics within Web 3.0 [1, 61, 63].

9 Gan et al.

Based on previous experience in the development of the Web, Tony Parisi proposed The Seven Rules of the Metaverse . That is, the Metaverse should be unique (rule #1) and can consistently be self-upgraded (rule #7); the Metaverse should serve everyone (rule #2) and be open to everyone (rule #4); the Metaverse is not controlled by anyone (rule #3); the Metaverse plays as an accessible network (rule #6) and it should be hardware independent (rule #5). Though the Metaverse is suspected of being overhyped, this does not prevent it from providing a more reliable environment for humankind in the future. Metaverse is just a tool for users to experience the virtual world. The immersive experience greatly improves the ability of users sensory perception. Metaverse will also forever change the internet devices users adopt. The relationship between Metaverse and Web 3.0 is more like the productive force and the relations of production. The Metaverse will eventually infiltrate every aspec