B.B. King fundamentally shaped how the electric guitar could sing in blues music. His invention of the "call and response" technique between his voice and his guitar (which he famously named Lucille) became a template for generations of players seeking expressive, vocal-like phrasing on the instrument.
King's influence extends far beyond blues into rock, jazz, and contemporary music. His economic approach to soloing, his mastery of string bending and vibrato, and his ability to convey emotional depth through single notes make his compositions invaluable teaching material for guitarists learning to prioritize musicality over technical display.