I had the same question after getting my bumper replaced last year. The shop brought up ADAS calibration and I honestly thought it sounded like something they add to inflate the bill. So I looked into it before agreeing. Turns out it is fairly standard after any repair that involves bumpers, panels, or windshields because the sensors behind those parts shift even slightly during the process and that affects how the system reads its environment. I found here is a reasonable breakdown of what the procedure actually covers including blind spot monitors, parking sensors, lane departure systems and radar or camera based components. What convinced me was learning that these systems have to meet factory spec tolerances to work correctly and that even a small offset can make things like blind spot alerts unreliable. The shop used recalibration equipment and verified each system individually afterward. I did not notice any obvious change in how the car drives but the alerts started behaving consistently again which they had not been doing since the repair. I would say if your car has any of those driver assistance features and body work was done near the sensors it is worth asking specifically whether calibration was performed and what was verified.