That's where the IP release comes in - it's like returning your seat at the café when you're done with it. When you release your IP address, you're telling the DHCP server that you no longer need it, and it can give it to someone else. It's like saying "I'm done with my coffee, you can take my seat now!"
The IP release process is usually automatic, but sometimes you might need to do it manually - like when you're switching to a different network or device. Don't worry, it's not as complicated as it sounds, and most devices will take care of it for you. Just think of it like packing up your things and leaving the café - you're freeing up space for someone else!