Fanchants are a long standing part of K-pop fan culture in South Korea, where audiences shout members' names and key phrases at set points in a song. TWICE, the nine member girl group formed by JYP Entertainment in 2015, released What Is Love in 2018 as the title track of their mini album of the same name. The song's call and response chorus made it ideal for a structured chant, and fan made guides spread online so ONCE, the group's fandom, could learn the timing for concerts, music shows and fan events.