DNS is the Domain Name System. It is a fairly complicated system, distributed across hundreds of servers worldwide and comprising several layers of interconnected technology.
Primarily, DNS is responsible for translating human-readable domain names into computer-usable IP Addresses. It is, in essence, a giant directory connecting names with numbers — the internet’s phone book.
The addresses associated with a single domain are called DNS records. They specify where to send requests associated with that domain.
Where are these records kept? They are stored on your domain’s Name Server.