Know Where Is What You’re Looking for in a Large Store

Why?

You enter a large store, and it’s hard to know exactly where is what.

How?

There is the simple solution that unfortunately I never encounter: give a map at the entrance.
Another more sophisticated solution would be an app that identifies what store you’re in by your location, and automatically shows a map for that store. It can also give you a list of products or product types and when you select will show you where it is on the store map.