STAB extra damage?

Question

I know what STAB does, but what does each acronym stand for, and by how much power does it increase?

Answer 1

STAB= Same Type Attack Bonus

Bonus is 50% .

If a pokemon of a certain type uses a move of the same type the power increases by 50% .

Ex. A fighting pokemon using hammer arm power will be :
100+(50/100)*100 = 150 .

Comments

Thank you! I was not sure whether it damaged x1.5 or +1.5. Now it is much clearer.

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Also  if your pokemon has the ability adaptability your STAB will be x2.0 rather than x1.5