A G-string is a musical instrument that belongs to the family of string instruments. It is typically the lowest string on a violin, viola, cello, or double bass, producing deep, resonant tones. The G-string is essential for creating harmony and depth in orchestral and chamber music settings. In addition to its role in classical music, the G-string is also found in various genres, including jazz and folk. Musicians often use it to add richness to their performances, making it a vital component in string ensembles and solo pieces alike.