The pull-off is executed by playing a note and then pulling the left hand finger off the string towards the floor. This causes a new note to sound. The pull-off is indicated by a curved line and the symbol "P"
Here is an exercise for developing control of pull-offs.
The following lick makes use of both hammer-ons and pull-offs. The term "lick" means a short musical phrase. Licks are very common in Blues lead playing.