In recent decades, the internet has undergone rapid development and profoundly changed our lives. From simple information exchange (known as Web 1.0) to complex social networks and global marketplaces (known as Web 2.0), the web has revolutionized our understanding of communication, economy, and society. Now, we stand at the beginning of a new era: Web3. This book aims to provide you with an in-depth insight into the concepts, technologies, and potential of Web3 and to show how it will shape the internet of the future. When Tim Berners-Lee articulated his vision of the World-Wide Web (WWW), he envisioned it as a new infrastructure that would facilitate innovative interactions among users and promote new forms of collaboration, especially within the research community.