The Name Servers of a domain show the DNS servers that are responsible for its DNS records. The Internet protocol address of the website (A record), the mail server that manages 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 web hosting provider and for any Internet domain to be using them and to be forwarded to their hosting platform, it should have their name servers, or NS records. If you want to open a site, for instance, and you insert the URL, the Internet 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 webhosting provider where the A record of the website is obtained, enabling you to see the content from the right 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 simply visual.