What makes No. 1 by CLC notable?

'No. 1' received positive critical acclaim and commercial success, debuting at number 7 on the Gaon Album Chart and generating significant buzz in the K-pop community. The title track 'No' particularly stood out for its fresh sound and choreography, contributing to CLC's growing popularity. Released on January 1, 2019, 'No. 1' marked CLC's return to the music scene after a two-year hiatus following their EP 'Free'sm. This EP showcased a mature sound evolution for the group, solidifying their identity within the competitive K-pop landscape.