What is DNS?
DNS (Domain Name System) is a system that is responsible for converting a domain into an IP address readable by the computer. Afterward, the server to which the domain is bound to get recognized and the user's browser can open the site located on it.
What is a DNS server?
A DNS server works within the framework of the Domain Name System and stores technical information about domains: IP addresses to access domains (A (address) record), mail server domains (MX (mail exchanger) record), etc. The faster the DNS server responds, the faster the site opens.