The NS, or Name Server records of a domain, show which servers deal with the Domain Name System (DNS) records for it. Setting the name servers of a particular hosting provider for your domain name is the easiest way to forward it to their system and all its sub-records will be taken care of 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, so, in case you want to modify any one of these records, you will be able to do it through their system. In other words, the NS records of a domain address reveal the DNS servers that 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 domain you are trying to access. That way the web site you will see is going to be retrieved from the proper location. The name servers typically have a prefix “ns” or “dns” and each domain address has at least two NS records. There is no functional difference between the two prefixes, so what kind a website hosting provider is going to use depends solely on their preference.