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 especially important during takeoff, landing, and while flying in busy airspace. ATC is made up of different sectors, including ground control, which manages aircraft on the runway and taxiways, and tower control, which oversees takeoffs and landings. By coordinating these activities, air traffic controllers play a crucial role in preventing accidents and keeping air travel safe for everyone.