This chapter involves numerous examples, using management cases and technology use cases, to understand the practical uses of Web 3 technologies. A discussion is had on Web 3 foundational concepts such as smart contracts, decentralized applications, decentralized identity and authentication, data privacy and control, and supply chain traceability. Then, cases related to DeFi, content monetization, decentralized exchanges, P2P lending, anonymized payments, lending platforms, stablecoins, financial inclusion and democratization, and autonomous funding are discussed. Tokenization led to the evolution of a new digital economy, and along with NFTs, the way digital art, real estate, and memorabilia are managed has changed. DAO is changing the way organizations work and are governed. Web 3 has several social applications and privacy-preserving technologies. Finally, interoperability options of Web 3 are discussed.