The NS, or Name Server records of a domain name, reveal which servers deal with the Domain Name System (DNS) records for it. Setting the name servers of a specific hosting provider for your domain is the most convenient way to point it to their system and all its sub-records will 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 on, so if you need to change any of these records, you will be able to do it by using their system. Put simply, the NS records of a domain name point out the DNS servers which are authoritative for it, so when you try to open a web address, the DNS servers are contacted to get the DNS records of the domain name you want to reach. In this way the web site you will see is going to be retrieved from the proper location. The name servers usually have a prefix “ns” or “dns” and every single domain address has at least two NS records. There is no functional difference between the two prefixes, so what kind a hosting provider is going to use depends entirely on their preference.