This option lets the Ride Builder detect and recalculate all the waypoints you placed into a path for the mover.
After clicking, you see a couple of messages similar to the following:
[13:16] Torgon’s Ride Builder v.3.0.2: Detecting route points, please wait 15 seconds to finish
[13:16] Torgon’s Ride Builder v.3.0.2: Detection completed
[13:16] Torgon’s Ride Builder v.3.0.2: Detected 7 Waypoints
[13:16] Torgon’s Ride Builder v.3.0.2: Transferring route points
[13:16] Torgon’s Ride Builder v.3.0.2: Transferring completed, ready to run
After the first line, there is a delay of 15 seconds during which the controller is busy with the waypoints, please wait.
As you can see the controller then, at the end, transmits the detected waypoints to any movers nearby, updating their paths for the next run.