Upon its release, The Best attained commercial success for the girl group, becoming their third, and to date, final chart-topper on the Oricon Albums Chart.

"Indestructible", released as a promotional single, was produced by Claire Rodrigues, Albi Albertsson, Chris Meyer, and written by Kamikaoru.

[8] Lyrically, the pop ballad talks about the indestructible relationship that two people, who are in love, share with each other, implying similar sentiments that Girls' Generation feels with one another as well as with their fans.

"[9] The song was showcased for the first time as a lyric music video during Girls' Generation's last stop of their third Japan tour in Tokyo between July 11–13, 2014.

[11][12] "Divine", released as the second promotional single, and was produced by Stephan Elfgren, Albi Albertsson, Sean Alexander and written by Kamikaoru,[13] There were two versions for the accompanied music video.

SM Entertainment announced on August 25 that the group would hold a concert commemorating their fourth anniversary debut in Japan at Tokyo Dome.