Air traffic control (ATC) is a service that helps manage the safe and efficient movement of aircraft in the sky and at airports. Controllers use radar and radio communication to guide pilots, ensuring that planes maintain safe distances from each other. This is crucial for preventing accidents and keeping air travel smooth. ATC operates in different areas, including ground control for managing aircraft on the runway and taxiways, and approach control for guiding planes as they arrive at an airport. By coordinating takeoffs, landings, and in-flight routes, air traffic controllers play a vital role in the aviation industry.