What specifically does "TPMS" light on dash indicate?

thank you. if it's a back tire, does it still need a front end alignment? i don't care about the sensor! i care about the tire, or the wheel. the sensor itself does not cause tires to go bad, right? it merely indicates the problem.

It simply monitors pressure. No , the rear has no alignment adjustments , if it's damaged and bent causing the tire wear , it should be checked by a body shop(if the damage is not obvious) , and replaced if needed. And , yes it should still have the alignment checked.