imagine your car lifted in the air and looked at it head on...your wheels should be straight up and down. If your camber is off, they will slant in or out like / or \, hence positive or negative camber. Most alignment shops will give you a printout showing your before and after camber after they align your car. When you lower your car you have to buy a special upper control arm because the factory ball joint isn't designed to bend that far. Toe is when the wheel tilts right or left.