What Do They Know stands as a defining track from Westlife's Turnaround era, capturing the group's signature blend of polished pop and heartfelt balladry. Released during a pivotal period in their career, the song reflects the band's ability to craft emotionally resonant anthems that resonated deeply with their global audience. The recording showcases the vocal harmonies and melodic precision that have characterized their extensive discography since their debut. As part of their broader catalogue, the track exemplifies the production values and songwriting sensibilities that sustained their longevity in the industry. It remains a notable song in their body of work, illustrating the consistent quality and emotional depth that fans have come to expect from the Irish pop group throughout their decades-long journey.