Ethereum Name Service (ENS) domains are secure domain names for the decentralized world. An ENS domain provides a way for users to map human readable names to blockchain and non-blockchain resources, like Ethereum addresses, IPFS hashes, or website URLs.
ENS domains can be registered through ens.domains, or bought and sold on secondary markets.
After creating an Ethereum wallet, users receive a wallet address to send their Ethereum assets to and from. The difficulty with this is that these standard addresses (a string of randomly generated numbers and letters) are too difficult to memorize and use consistently.
An ENS domain makes this easier. After registering or purchasing a domain name, the ENS resolves the address and the domain becomes the identifier for the specific address that the wallet is registered to (i.e. firstnamelastname.eth).
Despite being around since 2017, ENS has recently experienced a surge, with 160,000 unique users utilizing the network this month. 3-digit and 4-digit numbers, popular first and last names, brand names, and company names are amongst the most popular domains.