DNS stands for Domain Name System. It is a system that translates human-friendly domain names like www.digitalbrekke.com into IP addresses (like 192.0.2.1) that computers can understand.
Think of it as a map with directions to which way your browser has to drive to get to the web page. When you enter a domain name into a web browser, the browser sends a request to a DNS server to resolve the domain name to an IP address. The DNS server looks up the IP address associated with the domain name in its database, and sends it back to the browser. The browser then uses the IP address to connect to the web server hosting the website associated with that domain name, and requests the webpage content.
In simple terms, DNS makes it easy for people to access websites by using domain names instead of IP addresses, and it works as a phonebook for the internet, where domain names are the names and IP addresses are the phone numbers.