The song has sold more than 3 million copies in the United States. The song became XCX's first top 10 hit as a solo artist (after her features on ' I Love It' and ' Fancy') and re-entered the top ten twice before peaking at number eight. On 28 June 2014, the song jumped to number 29, becoming her first top-40 hit as a lead artist. The song debuted at number 62 on the Billboard Hot 100 on the week dated 21 June 2014, becoming XCX's first entry as a lead artist.

In April 2022, Clash listed the song among the 17 best of Charli's songs, with Isabella Miller stating that 'it captures the essence of youth culture with timeless stylistic and lyrical content that awakens the 2014 Tumblr teen in us all.' Commercial performance In January 2015, 'Boom Clap' was ranked at number eight on The Village Voice 's annual year-end Pazz & Jop critics' poll. 4Music said the song was 'infectious' and a 'feelgood track contrasts softly-sung verses with a big attitude-packed chorus' resulting in a song that was 'catchier than the clap.' Spin listed 'Boom Clap' at number 24 on its list of 'The 101 Best Songs of 2014,' writing that 'Charli XCX's excellent use of onomatopoeia gives this intoxicated Sucker cut her most unforgettable chorus yet.' Pitchfork named it the 37th best song of 2014. 'Boom Clap' received positive reviews from music critics. The song is composed in the key of E major. In a later interview, Duff said she had no idea that XCX had offered the song to her people and would have accepted the song if she had known.

Once Duff's management declined the offer, XCX decided to use the song as her contribution to The Fault in Our Stars motion picture soundtrack. The song was initially written during writing sessions for XCX's debut studio album, True Romance, then later offered to singer and actress Hilary Duff for her new album. 'Boom Clap' is a 'radio-ready' electropop and synth-pop ballad, written by Charli XCX, Fredrik Berger, Patrik Berger and Stefan Gräslund.

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The fault in our stars movie song