Watch the Left Hand Technique online guitar lesson by Richard Gilewitz from Fingerscapes

This exercise utilizes the left hand fingers to perform a hammer on and pull off technique. This is very common among fingerstyle players and there are often multiple variations with this technique such as double hammer ons, slides and bends.
It is very important during the hammer ons to have the right thumb strike the bass note precisely at the time the left hand hammer on note occurs such as on beat 2 in measure 4.