ELI5: Explain Like I'm 5

Mezzanine

Imagine you have a really tall building with many floors. If you want to make even more space for offices or stores, but you don't have any more room on the existing floors, you can add a special floor called a mezzanine.

A mezzanine is like a mini-floor that's built in the middle of a bigger floor. It's only about half the height of a regular floor and it's usually used for things like storage or an extra seating area in a restaurant.

It's like a bunk bed for a building- instead of using up more space, you're taking advantage of empty air space in the building to create more space for things.