The only benefit I see is just a fancy/branding for your domain name. Other than that I don't find much use unless you are into web hosting industry or have multiple apps running for a company's internal network operations.
Branding: Private nameservers allow you to use your domain name for the nameserver addresses, enhancing your brand's visibility and professionalism.
Control and Flexibility: With private nameservers, you have complete control over DNS settings, allowing you to customize and manage your domain's DNS records independently.
Security: Using private nameservers can improve security by reducing exposure to potential attacks on publicly known nameservers.
Improved Performance: Private nameservers can lead to faster DNS resolution, as they are specific to your hosting environment and not shared with other users.
Simplified Website Migration: If you need to change hosting providers, having private nameservers makes it easier to migrate your websites without affecting their functionality.
Setting Up Private Nameservers:
Registrar Settings: Access your domain registrar's control panel and navigate to the section for managing nameservers.
Create Nameserver Hostnames: Assign custom names to your private nameservers (e.g., ns1.yourdomain.com and ns2.yourdomain.com).
IP Address Assignment: Obtain the IP addresses of your hosting provider's nameservers (usually provided by the hosting company).
DNS Configuration: Update the DNS settings of your domain to point to the IP addresses of your private nameservers.
Propagation: DNS changes may take some time to propagate across the internet. Typically, it takes up to 48 hours for changes to take full effect.
Verify Setup: Use online DNS checking tools to ensure that your private nameservers are correctly configured and resolving properly.