What are private nameservers and how do I set them up?

Private nameservers are where your domain points to our nameservers so that your customers do not see our domain name on your account. If you do not set up private nameservers someone does a nameserver lookup on your domain it will show ns1..com and ns2..com
Once you set up private nameservers when someone does a nameserver lookup on your domain it will show ns1.yourdomain.com and ns2.yourdomain.com which will mask that you are using our services. Your clients can also use ns1.yourdomain.com and ns2.yourdomain.com instead of the default nameservers.
Depending on what register you used for your domain name you may be able to set up your private nameservers on your own or you may have to contact your registrar to have them set up for you.
If you already registered your private nameservers on your domain panel then follow this steps:

Login your cPanel
Click on DNS Editor icon
Then click on +A Record
In Name box paste your nameserver like ns1.example.com and in Address box paste nameserver IP which you already registered on your domain panel
If you have 2 nameservers the add them one by one on +A Record
Done!

If you need any assistance setting up your private nameservers please submit a support ticket and include which domain registar you are using and we will help you get them set up.