A domain name is a unique string of characters that identifies a website or resource on the internet. It serves as an address for the website and makes it easier for people to find and access the website, rather than having to remember a string of numbers (the IP address) to access the website.
For example, the domain name "www.example.com" is easier for people to remember and type into their web browser than the IP address "192.0.2.1". The domain name system (DNS) is responsible for converting the domain name into the IP address of the server hosting the website. This allows users to access the website by simply typing the domain name into their browser's address bar.