Fellow No Doubt member Gabrial McNair and Gwen's brother Eric Stefani, amongst other performers, provide instrumentation.

A departure from Gwen Stefani's previous country and holiday music releases, "Let Me Reintroduce Myself" is an energetic Latin-sounding reggae, ska, and pop track inspired by her early work with No Doubt.

Most critics gave the song positive reviews, calling it catchy and making favorable comparisons to No Doubt's releases.

[9] The jewelry worn by Stefani in the photograph, including a necklace, belt, and harness, was made by Azerbaijan designer Saida Mouradova, founder of Object & Dawn.

[11] Lauren Ramesbottom from The Loop also drew a comparison to her "Hollaback Girl" look, calling it a tribute to her past mixed with her "punk-modern style of the present".

[15][16] James Rettig from Stereogum pointed out that the song premiered just two months after the announcement of her engagement to American singer Blake Shelton.

[19] Additionally, a variety of "Let Me Reintroduce Myself"-themed merchandise, consisting of hooded sweatshirts, T-shirts, and sweatpants, became available for purchase on Stefani's official online store.

[14] Ultimately, "Let Me Reintroduce Myself" was described as a Latin-sounding reggae, ska, and pop song, influenced by Stefani's roots in No Doubt.

[5][6][22][23] Kelli Skye Fadroski from the Orange County Register compared the song to early No Doubt, noting the addition of horns and a flamenco-sounding guitar in the instrumentation.

[6] Entertainment Weekly's Joey Nolfi described the song's genre as ska pop and noted its use of "warm strings, echoey brass, and groovy keys"; furthermore, he compared its sound to Stefani's previous works, Tragic Kingdom (1995) and Return of Saturn (2000).

[26] Stefani said her intentions behind the song were to hopefully "bring a little bit of joy" to her fans and return to where she "started musically which was with ska and reggae".

Additional instrumentation in the song's production includes drums by Mano Ruiz, hand clapping by Golan, and bass and guitar performed by Niccoli.

[4] The song opens with the sound of radio tuning static, which Daniel Kreps from Rolling Stone felt was a reference to No Doubt's 2002 single "Underneath It All".

Because of claims by critics that she was ready to release a comeback single, Ross wanted to help Stefani put out a song that called out this idea.

[5] Stefani additionally references her 2005 single "Hollaback Girl" in the lyric: "I already gave you bananas / Go ahead and help yourself, me again in your ear".

[30] Emily Harris of GSG magazine appreciated that Stefani "stay[ed] true to her original signature sound" while adapting to modern trends.

"[32] Providing a mixed review, Lindsay Zoladz from The New York Times considered some of the lyrics to be clunky, but overall thought that "when her brassy voice rises to match the ska instrumentation of the chorus, there’s a fleeting rush of that old No Doubt magic".

The included photograph featured Stefani's exposed midriff as she wore a "bananas" belt, referencing "Hollaback Girl".

[48] The finished video was directed by American photographer Philip Andelman and released to Stefani's YouTube channel on January 1, 2021.

[52] The video begins with Stefani removing a face mask in order to speak with her producer Steve Berman on the phone.

[49] Philiana Ng from Entertainment Tonight noted how fans seemed to enjoy the video, particularly Stefani's revisiting of prior wardrobes.

[19] On December 19, 2020, she performed the song at the Global Citizen Prize awards show while accompanied by "backing dancers and a brass band", and fellow The Voice judge and singer John Legend introduced her on stage.