An IP address can be dynamic or static depending on who assigns it and for what purpose. Choosing one or the other will depend on our connection and network accessibility needs.
Dynamic IP addresses are mostly assigned by Internet operators to their customers and are used to browse the Internet regularly. These IP addresses are not permanent. They are usually deleted after each session is closed or change automatically at indefinite intervals (when a device disconnects from the network, the IP is released and another interface receives it). This type of dynamic IPs contributes to our privacy since they make it more difficult for websites to track us as they change. However, this dynamism can sometimes make the connection more unstable. The configuration of dynamic IPs on the network is done automatically through DHCP servers, without the user having to intervene.
A fixed or static IP address, whether a public IP or a private IP, does not change and is the one most commonly used, for example, by companies, institutions, or organizations to always ensure accessibility to their websites and web applications. A fixed IP allows its owner exclusive control of the address, without anyone else being able to use it, thus favoring the deployment of network services that require this type of configuration.  However, not all operators offer this type of IP, and if they do, the service usually costs an additional fee. Static IPs must be configured manually, and therefore require advanced knowledge to do so.