What do wing walkers indicate when performing their duties at the gate?

When wing walkers are performing their duties at the gate, they play a crucial role in ensuring the safety of aircraft movements. Their primary function is to signal to the flight crew that it is safe for the aircraft to begin taxiing. Wing walkers stand at the wings of an aircraft and provide guidance, particularly when visibility is limited or when the aircraft is moving in close proximity to obstacles, other aircraft, or personnel.

By indicating that an aircraft is about to taxi, wing walkers help prevent collisions and ensure a safe environment for all operations around the aircraft on the airside. Their presence and signals are vital during the taxi process, which is why this response is the most accurate reflection of their duties.