The clutch booster is a component found in some vehicles that helps to reduce the amount of force needed to operate the clutch pedal. It is typically located between the clutch pedal and the hydraulic master cylinder that actuates the clutch. The booster uses a vacuum or hydraulic pressure to assist the driver in pressing the clutch pedal, making it easier to engage and disengage the clutch. This can be especially helpful in heavy traffic or when the vehicle is stopped on an incline, as it can make it easier to shift gears smoothly.