The Domain Name Server/System (DNS) is a system for obtaining information about domain zones and IP addresses on which websites are hosted. Simply put, for your domain name to be able to indicate on which server your website is hosted and where it needs to go in order to open this exact website on the Internet, DNS records must be specified.
For example, to redirect any domain of yours to your website created on Site.pro builder, it is enough to specify the following DNS for the domain in your domain's DNS zone management panel:
ns1.site.pro
ns2.site.pro
ns3.site.pro
ns4.site.pro