Change your preferences here.
Deals damage. The user recovers HP equal to half of the damage dealt to the opponent, rounded down.
Absorb's damage output is pathetic and any HP regained is minuscule. If your Pokemon can use Mega Drain, use that; otherwise, any other Grass-type move is essentially better in every respect.
Mega Drain is a more powerful option with the same effect.
Leech Life is a Bug-type equivalent.