What makes Mama by Genesis notable?

'Mama' became one of Genesis's most commercially successful singles, reaching No. 4 on the Billboard Hot 100 and showcasing their ability to merge art rock with mainstream appeal. The album also highlighted the band's shift towards a more accessible sound during a pivotal era in 1980s music, influencing countless pop-rock artists that followed. Released on August 22, 1983, 'Mama' marked Genesis's first significant foray into a more commercial sound following the departure of guitarist Steve Hackett in 1977. At this point in their career, the band had achieved considerable mainstream success with albums like 'Abacab' and were solidifying their identity as a leading force in the evolving pop-rock landscape.