and other rock bands. "Blow" is a
rock,
blues rock and
hard rock song. It features a "chunky-fun" 80s heavy-metal "distorted electric guitar riff". The screeching guitar is accompanied by a lively drumbeat which "bounce[s] off [the] ears" and an extended shouted high note. "Blow" is an upbeat track, composed in the key of
E-flat minor with a tempo of 92 beats per minute. They showcase "Stapleton's familiar howl, a soulful Mars", as well as an uncommon "rough-around-the-edges" Sheeran.
AllMusic's
Stephen Thomas Erlewine and
Slant Magazine Seth Wilson, respectively described the single as loud and crazy; Erlewine says it is a "churning rocker". Sarah Murphy of
Exclaim! called "Blow" a strange fusion of each artists' genre—pop, rock, soul—with "Led Zeppelin worship". According to Jon Caramanica of
The New York Times the sound evokes a "raucous quasi-
Aerosmith screamfest".
Billboard Jason Lipshutz felt the guitar riffs and lyrics seemed to be inspired by
the Black Keys' album ''
Let's Rock'' (2019). Another lyric is "Pull my trigger, let me blow your mind". Mars says "Baby, tell me, what's your fantasy?" and Sheeran speaks of having a child "with his woman". Ben Boddez writing for
The Georgia Straight felt the recording is another example of the blending of music genres, which started with several newcomers dominating the top of the charts. Boddez opines that
rock and roll could make its way into the mainstream by artists like Sheeran making "marketable pop music". == Critical reception ==