What is Metta-Bhavana and how does one practice it? I can't find much information on Metta-Bhavana and I want to know:


what it is. What is the purpose of this type of meditation?
details concerning its practice. How does one practice this meditation?
'Metta' is good-will &amp; non-hatred. It is wanting other people to be happy. This does not mean to "save" or transform other people into inherently happy people but to abide with non-conflict with other people. The meditation method is below:


  Whatever living beings there may be;  Whether they are weak or strong,
  omitting none, The great or the mighty, medium, short or small,   The
  seen and the unseen, Those living near and far away,  Those born and
  to-be-born. Wishing: In gladness and in safety — May all beings be at ease/be happy! (sabbe sattā bhavantu sukhitattā)
  
  Let none deceive another,     Or despise any being in any state. Let none
  through anger or ill-will     Wish harm upon another. Even as a mother
  protects with her life    Her child, her only child, So with a boundless
  heart     Should one cherish all living beings.
  
  Radiating kindness over the entire world:     Spreading upwards to the
  skies, And downwards to the depths;   Outwards and unbounded, Freed
  from hatred and ill-will.     Whether standing or walking, seated or
  lying down Free from drowsiness,  One should sustain this
  recollection. This is said to be the sublime abiding.     By not holding
  to fixed views, The pure-hearted one, having clarity of vision, freed from all sense desires.
  
  Karaniya Metta Sutta