The Name Servers of a domain name point out the DNS servers that manage its DNS records. The Internet protocol address of the site (A record), the mail server that handles the emails for a domain (MX records), any text record in free form (TXT record), forwarding (CNAME record) and so on are extracted from the DNS servers of the hosting provider and for any Internet domain to be using them and to be forwarded to their hosting platform, it has to have their name servers, or NS records. If you want to open a site, for instance, and you enter the URL, the 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 hosting company where the A record of the website is obtained, enabling you to view the content from the correct 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.