Embellishments—or ornaments—are used to enrich melodies by extending the notes. When executing these ornaments, it's important to use the right hand with proportional energy and precision both to the number of notes being played and to the quality of their sound. Focus on the pressure of both hands: the right hand produces the note and the left hand shapes it—there’s no need to "force" the notes. Another ornament is vibrato: a light, rapid variation on the pitch of a note that enhances the texture of the sound.
Ornaments are reflections of emotion, touching us when the amplitude of vibration syncs with the movements that are familiar to the soul. As they give guitar playing a special character, ornaments should be used to give the music life, to "exalt" the music, but be careful to not make it the music's "raison d'être."