In this guitar lesson you will learn how to play hammer ons and pull offs. Hammer ons and pull offs are fundamental techniques of the guitar. A hammer on is played by bringing a fretting-hand finger down on the fingerboard behind a fret, causing a note to sound. It’s the opposite of a pull off which is played by “pulling” the string off the fingerboard with one of the fingers being used to fret the note. This lesson is aimed at beginners.