TAMAS is andhakar (darkness), giving and getting pain is Tamas. Its most binding, keep away from it to get Mukti
RAJAS is sensual pleasure with no caring. Pleasure followed by pain is Rajas, it also binds.
SATAV is giving and getting pleasure. It highest of three- Satav, Rajas and Tamas. It purifies the heart and has least bondage.
GUNATIT is getting away from all three - Satav, Rajas & Tamas. When there is no like or dislike, nothing bothers, all is acceptable as wish of God, then we become gunatit and get deliverance.