ENS Naming Service

During the early days of the internet, one of the central problems computer scientists faced was that domain names and internet protocol addresses had not been matched up, making them unfriendly to an average user.
What that meant is if you wanted to access a website, you would need to type out the full IP address of the site you wanted to visit, such as 54.235.191.121. Since IP addresses are just strings of numbers and dots that are long and difficult to remember, It made it hard to browse the web.
However, following the cutting-edge research done by Elizabeth Feinler, an American scientist, in the 1970s, Paul Mockapetris, an American computer scientist, developed the Domain Name System (DNS) in 1983.

Despite all the technological wizardry occurring in the crypto sector, cryptocurrencies still mostly use a system similar to the old IP address setup.
If you want to send your bitcoin to someone else’s address, you will have to use that person's wallet address as opposed to using something human-friendly like the wallet owner’s name.
That’s where the Ethereum Name Service (ENS) comes in.