The Name Servers of a domain name show the DNS servers that manage its DNS records. The IP address of the website (A record), the mail server that handles the emails for a domain (MX records), any text record in free form (TXT record), directing (CNAME record) and so forth are taken from the DNS servers of the hosting provider and for any domain address to be using them and to be pointed to their hosting platform, it needs to have their name servers, or NS records. If you wish to open an Internet site, for instance, and you type in the URL, the browser connects to a DNS server, which keeps the NS records for the domain address and the request is then redirected to the DNS servers of the webhosting provider where the A record of the website is retrieved, enabling you to see the content from the proper location. Usually a domain address has 2 name servers that start with NS or DNS as a prefix and the contrast between the two is only visual.