It became a commercial success after earning popularity on the video-sharing app TikTok and was certified quadruple platinum by the Recording Industry Association of America (RIAA).

"Mood" peaked atop the Billboard Hot 100, where it spent eight non-consecutive weeks and also topped the charts in the United Kingdom, Australia, Ireland, Austria, Denmark, the Netherlands, Norway, and Sweden.

"Mood" was positively received by critics, who praised it as being catchy,[1][2] and it was included on lists of the best songs of 2020 published by Slate, Billboard, and The New York Times.

A music video for "Mood", in which 24kGoldn and Dior have disputes with two separate girls, was released on August 5, 2020, and directed by Sebastian Sdaigui.

[6] To promote "Mood", Columbia Records pitched the song to various pop and "Gen Z" playlists on popular music streaming services.

[6][7][9] This song is played in the key of G minor (in common time) with a tempo of 91 beats per minute, and 24kGoldn and Dior's vocals range from a low of F3 to a high of G4.

[10] Its instrumental includes an indie[11] and post-grunge-influenced guitar riff played by Omer Fedi (which is warped and echoed at points throughout the song),[1] and "trap-style" hi-hats and snare drums.

[16] HotNewHipHop's Alexander Cole called the track "perfect for summer", and said the song's title "certainly fits the vibe as we get a very summer-inspired beat".

[17] For Billboard, Carl Lamarre stated that the song was a "feel-good record" and a "late-summer bop", describing the hook as "catchy", while Josh Glicksman of the same publication called the chorus "easily digestible" and "sonically light".

[2] Another Billboard writer, Andrew Unterberger, remarked that the song's energy felt "impossibly fresh" and that it is a "visceral banger".

[9] Chris Molanphy of Slate called the song "fiendishly catchy" and also praised the track's hook, opining that it was "one of the most instantly infectious rap-rock refrains ever".

[18] In another review of the album, Stereogum's Chris DeVille stated, "like hits from forebears like Juice WRLD, Post Malone, and Lil Uzi Vert, 'Mood' was self-evidently a pop song, infectiously catchy and irresistibly propulsive."

[31] "Mood" peaked at number one on the Mainstream Top 40 chart for eight consecutive weeks and broke the Mainstream Top 40 spin record, previously held by Ed Sheeran's 2017 song "Shape of You", by logging 17,748 plays among the chart's reporting stations for the week of November 22, 17,707 plays.

on October 26, 2020, followed by a performance on The Ellen DeGeneres Show on November 5, 2020, opening with a skit before singing the song on a sunflower-themed set.

[49][50] English indie rock band Glass Animals performed a cover of "Mood" for BBC Radio 1's Live Lounge program in November 2020.

[187] Consequence's Wren Graves wrote, "[Bieber and Balvin] both sound like nobody else on the planet, and the contrast helps 24kGoldn shine.