Websites on the internet consist of files on a physical server connected to the Internet by numbers called IP addresses. Accessing long and complex to remember numbers is not very practical, and so domain names were born. A Domain Name Server (DNS) is what translates those numerical IP addresses into readable domain names we all know and love. Since every website lives at a numerical IP address, it requires a DNS service for translation. Being a critical part of the Internet infrastructure, if a DNS service suffers interruptions or performance problems, it can affect visitors accessing a site.
To simplify, DNS is the equivalent of a phone book that maintains a directory of domain names and translates them to the Internet Protocol (IP). DNS is one of the most fundamental but crucial services on the Internet. It is essential for any online business to use a service that routes DNS queries fast, secure and with global redundancy.