DNS (Domain Name System), is the service which translates between Internet names and Internet addresses. DNS points a domain name to Server where website data exists. DNS are resolved on IP address of the Server machine. So when a user write domain on browser, then DNS automatically redirects user to server, where website data exists.
The DNS Check in Whoisping.com Tools will check your DNS health and help you find errors, and verify that you domain name has been set up correctly.
The DNS check will automatically find out which DNS servers are used by the domain name you specify, then perform a number of tests on them to make sure that the domain name is properly set up and that those DNS servers are responding in a consistent and correct manner.