“Butter” is a dance-pop song with lyrical confessions of sweet, romantic love. The fun and witty lyrics brimming with positive and bright energy will instantly uplift moods. The track uniquely shows each of the BTS' member’s charms as they show how smooth and at times charismatic, they can be. The song is dubbed as a summer anthem credited to its distinctive bass line and crisp synth sounds, ready to melt the listener’s heart.

It becomes their second English song following “Dynamite” and will receive a more widespread promotion on radio stations. It is also their 3rd track to debut at #1 on the Hot 100, and their 4th track to hit #1 on the Hot 100. The track is produced by Rob Grimaldi, Stephen Kirk, and Ron Perry, the Chairman & CEO of Columbia Records, one of the very few times he is credited as producer on a song.