Unstoppable Domains provides Web3 domain names that are stored on the blockchain. Users can purchase and register domain names with extensions such as .crypto, .nft, and .wallet. These domains can be used for websites, social profiles, and cryptocurrency payments, providing a decentralized and secure online identity. Users have the ability to transfer their domains and map different cryptocurrency addresses to them. Unstoppable Domains is not part of the traditional DNS system and offers features such as no renewal fees and optional privacy settings.