The Name Servers of a domain name show the DNS servers that deal with its DNS records. The Internet protocol address of the website (A record), the mail server that takes care of the e-mails for a domain name (MX records), any text record in free form (TXT record), pointing (CNAME record) etc are obtained 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 ought to have their name servers, or NS records. If you wish to open a site, for instance, and you type in the URL, the web browser connects to a DNS server, which keeps the NS records for the domain name and the request is then sent to the DNS servers of the hosting provider where the A record of the web site is retrieved, enabling you to look at the content from the proper location. Ordinarily a domain address has 2 name servers that start with NS or DNS as a prefix and the difference between the two is simply visual.