Muck in Poker - Rules and Strategy

I finally noticed some XP gain when I decided to show my cards upon folding to a bet, and the rep reward was called Muck it Correct me if I'm wrong,

Although rules vary from poker room to poker room, the muck is often considered a point of no return In other words, a hand is generally considered live until

what does tilt mean in poker What does auto-muck hand mean?

what is adminitration In a poker game, the term 'muck' means the act of discarding or folding your hand without revealing one's hole cards to the table or other players