The NS, or Name Server records of a domain, show which servers manage the Domain Name System (DNS) records for it. Setting the name servers of a given hosting provider for your domain name is the easiest way to forward 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, if you would like to modify any one of these records, you're going to be able to do it by using their system. Put simply, the NS records of a domain name reveal the DNS servers that are authoritative for it, so when you try to open a web address, the DNS servers are contacted to retrieve the DNS records of the domain you are trying to reach. That way the web site you will see is going to be retrieved from the correct location. The name servers usually have a prefix “ns” or “dns” and each domain has at least two NS records. There is no practical difference between the two prefixes, so what kind a host company will use depends only on their preference.