The Name Servers of a domain show the DNS servers that deal with its DNS records. The Internet protocol address of the web site (A record), the mail server that deals with the e-mails for a domain (MX records), any text record in free form (TXT record), forwarding (CNAME record) and so forth are taken from the DNS servers of the website hosting company and for any domain address to be using them and to be directed to their hosting platform, it needs to have their name servers, or NS records. If you would like to open an Internet site, for example, and you enter the URL, the browser connects to a DNS server, which keeps the NS records for the domain name and the request is then forwarded to the DNS servers of the webhosting provider where the A record of the website is obtained, so that you can see the content from the proper location. Commonly a domain name has 2 name servers that start with NS or DNS as a prefix and the difference between the two is simply visual.
