Answer
We call a transfer a ride from point A to point B with no stop in between and with the fastest route, and without waiting time.
For example:
A chauffeur welcomes and picks you up at the airport and drops you off in the city near by. There is no stop planned during the ride. Once the driver dropped you off, the service is over. That’s what we call a transfer.
Any other services requested during the transfer service may be billed (any stop on the way , any detour, or services such as picking up passengers on another location…)