Camber Angle adjusts the angle of the wheel on the vertical axis, from a front-viewing angle, with negative Camber pointing the top of the wheel inward on the car.
Increasing the Camber Angle of the wheel can improve the car's cornering ability by maximising the tyre’s contact patch through a turn as the car rolls to one side through lateral g-force. Decreasing the Camber Angle of the wheel can improve acceleration (when used on the rear) and braking performance in a straight line, but comes at the detriment of cornering ability.
Pro Tip: Max negative Camber is the preferred setting to maximise grip at both the front and rear. Only decrease the amount of negative camber (by just a few clicks) when conditions are wet, as it will improve traction on the rear, braking ability and maintain a better contact patch with less roll from the car due to lower g-forces.