"IDK About You" is a footwork song constructed around a fast drum pattern of 160 beats per minute and a female gasp utilized as percussion.

"[4] Upon the release of Plunge, "IDK About You" was named Best New Track by Pitchfork, with critic Mark Pytlik describing the song as "next-level goth techno insanity," further stating: "The end result is pure adrenaline, making this the frantic and booming centerpiece of an already twitchy album.

"[1] The music video for "IDK About You" was uploaded to Fever Ray's YouTube channel on 16 February 2018.

In the video, a large group of costumes descend upon Fever Ray's character in a dirty and colored room filled with posters of Justin Bieber, glowing orbs, scrawled messages and a vaginal doorway rimmed with teeth.

In a press release, Dreijer stated that the video also serves as an introduction for their touring band, which consists of Liliana Zavala, Mikaela Hansson, Maryam Nikandish, Diva Cruz, and Helena Gutarra.