Final answer:
Jazz at Philharmonic was a series of concerts that brought together black and white jazz musicians to perform on the same stage, promoting racial equality.
Step-by-step explanation:
Jazz at Philharmonic was a series of concerts held from 1944 to 1957 by jazz impresario Norman Granz. The concerts featured some of the greatest jazz musicians of the time, including Dizzy Gillespie, Ella Fitzgerald, Charlie Parker, and Lester Young. These concerts were significant in advancing jazz and social change because they brought together black and white musicians to perform on the same stage at a time when racial segregation was still prevalent in many parts of the United States. The integration of jazz music helped to break down barriers and promote racial equality.