The Name Servers of a domain name show the DNS servers that manage its DNS records. The Internet protocol address of the site (A record), the mail server that takes care of the e-mails for a domain (MX records), any text record in free form (TXT record), pointing (CNAME record) and so forth are taken from the DNS servers of the website hosting provider and for any domain 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 an Internet site, for instance, and you enter the URL, the web 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 hosting provider where the A record of the site is obtained, so you can see the content from the correct location. Normally a domain name has two name servers that start with NS or DNS as a prefix and the difference between the two is simply visual.