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 specific host company for your domain name is the simplest way to point 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), etc, so if you would like to edit any one of these records, you'll 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 name you are trying to reach. In this way the web site you will see will be retrieved from the correct location. The name servers usually have a prefix “ns” or “dns” and each domain has at least 2 NS records. There is no practical difference between the two prefixes, so what type a web hosting provider is going to use depends exclusively on their preference.