The NS, or Name Server records of a domain name, point out which servers manage the Domain Name System (DNS) records for it. Setting the name servers of a given host company for your domain address is the easiest way to direct 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 wish to change any one of these records, you will be able to do it using their system. In other words, the NS records of a domain address point out 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 web site you will see is going to be retrieved from the proper location. The name servers normally have a prefix “ns” or “dns” and each domain address has at least two NS records. There isn't any practical difference between the two prefixes, so which one a website hosting provider will use depends entirely on their preference.