Vibrato refers to the rapid variation in pitch while singing. Before the advent of microphones, vibrato was developed to allow singers to maximize their volume without hurting their voice. Nowadays, vibrato can bring an added warmth and timbre to your singing voice that makes it sound mature. If you want to develop your vibrato, a healthy posture, deep breaths, and a relaxed body can all improve your tone. With time and practice, you can develop a stronger, clearer vibrato!