What makes Angel of Harlem by U2 notable?

'Angel of Harlem' reached number 14 on the Billboard Hot 100 and showcased U2's ability to blend commercial appeal with artistic depth. The song pays homage to Billie Holiday, highlighting themes of love and loss, which resonated with audiences and critics alike, further cementing U2's status in the rock landscape of the late '80s. Released on December 1, 1988, 'Angel of Harlem' came during U2's transition from their critically acclaimed album 'The Joshua Tree' to the more experimental 'Rattle and Hum'. This single marked a deepening exploration of American musical influences, particularly jazz and blues, as the band sought to expand their sonic palette while maintaining their signature anthemic sound.