The idea is that when you go to pick someone up from Arrivals, instead of circling around until they show up, you go and park in the cell-phone lot until the person calls you and summons you.
Ideally, the lot is located so the time to drive from there to the terminal is roughly the same as the time to deplane and walk to the curb.
It differs from a regular parking lot in that usually
Credit:stackoverflow.com‘