What makes Millennium by Robbie Williams notable?

'Millennium' became an anthem of the late '90s, reaching No. 1 in several countries and earning critical acclaim. The song's themes of existential reflection resonated with listeners, making it a defining track of the Britpop era and solidifying Williams' status as a solo superstar. Released on September 7, 1998, 'Millennium' marked Robbie Williams' first solo album after leaving Take That. At this point in his career, he was transitioning from pop boy band fame to establishing himself as a solo artist, setting the stage for his future successes.