Reserved IP addresses provide you with the capability to own a dedicated regional external IPv4 address customized to your specific requirements. This allows you to seamlessly connect it to your Virtual Private Server (VPS) and easily reassign it between machines, eliminating any potential risk of loss.
In the event that you need to reinstall your virtual machine, you have the option to reserve your IP and continue using it on your new VPS, ensuring that your services remain associated with the same IP address.
Additionally, if you're strategically planning the infrastructure of your server or database, reserving your IP addresses in advance allows you to predefine DNS names, providing a proactive approach to managing your network resources.