Air Drop between Macbook Pros through local wifi?

My wife's cousins son was traveling the U.S. after his first year of college in a computer science major on the east coast, showed me how to use "Air Drop" to move 21,000 photos that I had been struggling to move from my old 2009 Macbook pro to my newer one from 2015 that I bought in 2016. It only took 6 hours to move 21,000 photos from my old Macbook to my newer one so I was pretty impressed what you could send through my local Wifi between macbook pros one 2009 and one 2015.

So, if you have a lot of photos or data to move between macbook pros or Imacs and macbooks or other Imacs you might check into how to move this data through "Air Drop".