Okay kiddo, imagine that you have a lot of toys in your toy box but you only play with a few of them. This is like a gate having a lot of space for things to go through, but only using a small part of it. When a gate is underutilized, it means that it is not being used to its fullest potential.
For example, if there is a big gate at a zoo but only a few people are using it, the gate is not being fully used. It's like having a big car but only driving it a few miles each week.
When gates are underutilized, it can lead to problems like traffic jams or delays because the available space is not being used efficiently. So, it's important to use gates to their fullest potential to help things run smoothly.