ELI5: Explain Like I'm 5

Commercial modular construction

Commercial modular construction is a way to build things like offices, apartment buildings, and other types of buildings that are put together like a puzzle. Instead of building things from scratch, the walls, floors, ceilings, and other pieces of the building are made offsite in a factory. They are then brought together like a puzzle and connected with things like bolts to make the building. This is quicker than building it all from scratch and it can save money.