EMZETT.NS Record
In short: A DNS record type that defines which name servers are authoritative for a domain or subdomain — i.e. allowed to give the “real” answers.
In more detail: When registering a domain, the NS records are stored at the registrar and usually point to the name servers of the DNS host (e.g. Vercel, Cloudflare). Only once this delegation is set up correctly do all further DNS records (A, CNAME, MX, …) of the domain take effect.
In Depth
A domain’s NS records form the decisive link between the registrar (where the domain is registered) and the DNS host (who manages the actual DNS records) — the two don’t have to be the same. If you register a domain at a cheap registrar, for example, you can still point the NS records to a different provider (e.g. Cloudflare or Vercel), which then handles the actual DNS management.
emzett-digital.com. 86400 IN NS ns1.vercel-dns.com.
emzett-digital.com. 86400 IN NS ns2.vercel-dns.com.
This “delegation” is the basis of the entire hierarchical DNS structure: the .com TLD server itself doesn’t know any A/CNAME/MX records of individual domains, only which name servers it has to refer to for a particular domain — only there are the actual DNS records answered. If you change the NS records at the registrar, depending on the TTL of the previous delegation, it can take up to 48 hours for the change to reach everywhere worldwide, since old values can still be cached in various resolvers.
See also: DNS Records, Domain