The NS, or Name Server records of a domain name, point out which servers handle the Domain Name System (DNS) records for it. Setting the name servers of a specific hosting provider for your domain address is the most effective 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 if you would like to edit any of these records, you'll be able to do it using their system. To put it differently, the NS records of a domain address point out 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 domain name you are trying to access. In this way the site you will see is going to be retrieved from the correct 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 sensible difference between the two prefixes, so what type a hosting provider will use depends exclusively on their preference.