ADAS calibration is the process of realigning a vehicle's cameras and sensors to ensure its Advanced Driver-Assistance Systems (ADAS) function correctly, as they can become inaccurate after certain repairs. This is crucial for systems like adaptive cruise control, lane keep assist, and automatic emergency braking, which rely on precise data to operate safely. Calibration is necessary after any repair or event that might disrupt the sensors, such as a windshield replacement, fender bender, or even a wheel alignment.