Vibrato is a technique of rapidly moving a note up and down in the direction of the adjacent strings. Vibrato is an important method of sustaining a note once it has been picked. It also gives much more expression to your playing. Vibrato is usually found on long notes. or a note at the end of a phrase. Vibrato is usually obtained by the movement of the wrist away from the neck and back towards the neck, much like turning a doorknob. The symbol for vibrato is a wavy line.
The following lick demonstrates the use of vibrato.