Decentralized domain names are domain names that are managed on a blockchain rather than through traditional, centralized domain name systems (DNS). Unlike conventional DNS, where a central authority like ICANN controls the registration and management of domain names, decentralized domain names are controlled by their owners, with all transactions and ownership recorded on a blockchain.

These domains, often represented as NFTs (non-fungible tokens), provide several benefits including enhanced security, censorship resistance, and direct ownership by the user without relying on intermediaries. For instance, once a decentralized domain is registered, it can't be easily revoked or censored by any central authority. Additionally, these domains often allow users to receive cryptocurrency directly to the domain name instead of a long wallet address, simplifying transactions.

Overall, decentralized domain names are a key component of Web3, offering more control and privacy to users compared to traditional domain names​.