Bedding-in (sometimes referred to as "break-in") creates an even transfer film at the pad and rotor interface. This is a prime source of noise and uneven braking feel.
This is a general guide, The bedding in process itself is very simple.
Procedures differ based on pad type and vehicle, so always consult your pad's instruction manual. But here's a typical approach:
Locate a safe road that has no traffic.
Brake moderately from 40 to 10 mph (65-15 km/h).
Drive for a few minutes to allow brakes to cool down.
Do not drag brake pads against rotors while vehicle is in motion (could impress material into hot rotors).
Common mistakes
Harsh panic stops right after fitting
First drive - Riding the brakes downhill
One of the causes may be bringing the car to a complete stop and continuing to press the pedal after several hard brakes.
Refurbishing additionally worn brake parts or overlooking stuck slide pins
In total, a proper bedding-in process time is around 15–20 minutes and may really change the experience of braking from being a quiet and smooth one to undergoing squealing for weeks.