Maybe I, not OP, can chime in with an example. Since labeling myself an introvert I was better able to know what attending bigger social come togethers (like team events, family reunions, conferences and the like meant to my "energy" level.
I liked how in another thread a commenter described this "energy" as maybe the energy necessary for our brains to keep the shields up.
Attending a social event to me means I know it will deplete me. It will require me to find a way of refueling afterwards. I now know better when and why to make this trade off. Because there are benefits to attending certain situations/events - I just need to balance them for my mind and body with taking care of myself.
It is like doing a grueling but necessary work. I know it needs to be done and I know how to take care for me afterwards.
And on the other hand it also helped me to understand, why certain situations (like being with a few select friends and talking all night) left me invigorated and provided said "energy".
So labeling myself that way provided a heuristic for managing my mental state and energy level better than before.