What makes 0+1=1 (I Promise You) by Wanna One notable?

'0+1=1' debuted at number one on the Gaon Album Chart and sold over 500,000 copies, solidifying Wanna One’s impact on the K-pop industry. This album not only showcased their musical evolution but also served as a bittersweet farewell to fans, culminating in significant emotional resonance within the K-pop community. Released on March 19, 2018, '0+1=1 (I Promise You)' is Wanna One's final album before their disbandment, marking a poignant conclusion to their two-year journey. The album followed their highly successful debut album, '1X1=1 (To Be One)', which had established them as a leading force in the K-pop scene.