Vibratos can add life to your playing. As its names suggests, vibrato is a technique that creates a vibrating sound around a root note. In classic guitar vibrato, we vibrate the string sidewards, right and left. This is illustrated in the following video:

Rock guitar vibrato is slightly different since you vibrate the strings up and down, instead of left and right. Either techniques can be alternated and varied to your personal taste. You can also play with the speed and amount of modulation.

On a guitar tablature, a vibrato is denoted by a ‘~’ or a ‘V’.