NeetoSite is a website builder with custom domain support, so your site can live at an address like site.yourbusiness.com instead of the default neetosite.com URL. You add the domain from the Admin Panel, copy the CNAME record NeetoSite provides, and add it at your DNS provider. If your provider does not allow a CNAME on the root domain, you can use an ALIAS record instead.
After you click Validate, DNS changes can take 24 to 48 hours to propagate, and you get an email once the domain is verified. NeetoSite issues and auto-renews the SSL certificate, so there is nothing to manage there. Your existing NeetoSite link keeps working alongside the custom domain, and you can switch back to the default domain at any time by deleting the custom one.