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 name is the most convenient way to direct it to their system and all its sub-records will be managed on their end. This includes A (the IP address of the server/website), MX (mail server), TXT (free text), SRV (services), CNAME (forwarding), etc, if you would like to change any one of these records, you are going to be able to do it by using their system. Put simply, the NS records of a domain reveal the DNS servers that are authoritative for it, so when you try to open a web address, the DNS servers are contacted to obtain the DNS records of the Internet domain you want to access. In this way the website that 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 sensible difference between the two prefixes, so what type a website hosting provider will use depends entirely on their preference.