The "B String" refers to a specific string on a musical instrument, particularly in stringed instruments like the guitar or violin. In standard tuning, the B String is the second string on a guitar, tuned to the note B. It plays a crucial role in creating chords and melodies, contributing to the overall harmony of the music. In the context of a violin, the B String is not typically present, as violins have four strings tuned to G, D, A, and E. However, in other stringed instruments, such as the bass guitar, the B String is often the lowest string, providing depth and richness to the sound.