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