Can someone explain land leasing to me?

[Patrick Philip]

I've looking at a commercial real estate web site. One of the sections is "Land Leasing."

These are vacant parcels of land zoned commercially. The listings will say "great location for retail" or something like that.

So someone rents this land from them, and the owners allow the renters to build a structure on the land? What happens when the renters want to leave or are evicted? Do they demolish the building? Or did the owners get a free building?

Wouldn't it make more sense for the renters to rent somewhere that already has a building so they don't have to pay to build one?