The NS, or Name Server records of a domain name, indicate which servers handle the Domain Name System (DNS) records for it. Setting the name servers of a given hosting provider for your domain address is the easiest way to forward it to their system and all its sub-records are going to be handled on their end. This includes A (the IP address of the server/website), MX (mail server), TXT (free text), SRV (services), CNAME (forwarding), and so forth, if you wish to edit any one of these records, you are going to be able to do it using their system. To put it differently, the NS records of a domain address reveal the DNS servers which are authoritative for it, so when you attempt to open a web address, the DNS servers are contacted to get the DNS records of the Internet domain you want to access. This way the website you'll see is going to be retrieved from the correct location. The name servers usually have a prefix “ns” or “dns” and each and every domain name has at least 2 NS records. There is no sensible difference between the two prefixes, so what type a host company will use depends entirely on their preference.