Caster, camber, toe — what they do
Camber tilts the wheel toward or away from the car (controls cornering grip). Caster tilts the steering axis (controls return-to-center feel). Toe points the wheels in or out (controls straight-line stability AND tire wear). All three are measured at all four corners on a real alignment. Two-wheel 'thrust angle only' alignments leave the rears unchecked and won't catch what's actually killing your tires.
