What is air traffic control (transportation)

To put it bluntly, he is mainly responsible for commanding aircraft flight.

The first line is to work in the tower with a microphone, responsible for the launch, taxiing, take-off, route flight, approach and landing of the aircraft. ...

Others are all around the different positions of commanding aircraft, such as route information analysis and weather forecast.

Anyway, it is around the work of commanding aircraft flight settings. Ensure the safe operation of the aircraft.