The Name Servers of a domain name point out the DNS servers that deal with its DNS records. The IP 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) and so on are obtained from the DNS servers of the web hosting company and for any domain address to be using them and to be pointed to their hosting platform, it ought to have their name servers, or NS records. If you want to open a site, for instance, and you type in the URL, the Internet 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 web site is obtained, allowing you to look at the content from the right location. Commonly a domain name has two name servers that start with NS or DNS as a prefix and the contrast between the two is only visual.