Answer Description
A server needs to be accessed at all times, with outages kept to a minimum. Using anything but static IP addresses will cause issues when clients attempt to access the server. If the Ip changed, the network and clients will have to learn about the change.
Wikipedia
An Internet Protocol address (IP address) is a numerical label such as 172162541 that is connected to a computer network that uses the Internet Protocol for communication An IP address serves two main functions: host or network interface identification and location addressing Internet Protocol version 4 (IPv4) defines an IP address as a 32-bit number However, because of the growth of the Internet and the depletion of available IPv4 addresses, a new version of IP (IPv6), using 128 bits for the IP address, was standardized in 1998 IPv6 deployment has been ongoing since the mid-2000s IP addresses are written and displayed in human-readable notations, such as 172
IP_address - Wikipedia, the free encyclopedia