Bliss or enlightenment.

Also known as Nirvana (sanskrit) or Nibbana (Pali), this limb is best described as integration. There is now complete integration of subject and object and bliss or enlightenment takes place.

Rather than viewing Samadhi as the final goal or final limb that is sought to be achieved somewhere in the distant future – Samadhi can happen in glimpses to anybody and the practice of yoga (all eight limbs) helps the yogi to sustain this bliss longer and longer and experience actual liberation which means to se things as they really are.