Okay, so imagine you and your friend want to meet up at a park. You both agree to meet at the big oak tree in the center of the park. The oak tree is like a locator - it helps you find your friend.
With computers, we use something called an identifier, which is like a name for a computer. Just like you have a name, like Sarah, computers have names too. But instead of calling them by their names, we use numbers called IP addresses to find them.
An identifier/locator network protocol helps computers find each other even if they change their IP address or move to a different network. It's like a big map that keeps track of all the computers and their locations.
So basically, an identifier/locator network protocol helps computers find each other and stay connected even if things change. Just like you and your friend can still find each other if you move to a different park, as long as you both agree on a new meeting spot.