It was released through her label Odd Atelier and Columbia Records on October 11, 2024, as the lead single from her upcoming debut studio album, Ruby (2025).

The song was written and composed by various contributors, including Jennie, Claudia Valentina, and Zikai, and was produced by El Guincho, Jelli Dorman, Jumpa, and Serban Cazan.

The singer promoted "Mantra" with performances on Jimmy Kimmel Live!, the South Korean music programs M Countdown and Show!

After departing from YG Entertainment for solo activities, Jennie founded her own record label named Odd Atelier in November 2023.

[4] On the 30th, she officially announced the single's name as "Mantra" and its release date of October 11 with a flirty teaser video containing a snippet of Jennie singing about girls having fun.

"[11] She similarly described the song to Vogue as a "fun, upbeat anthem that celebrates girl power and inspires every woman to shine in her own way with confidence.

"[12] In a review for NME, Puah Ziwei scored "Mantra" four out of five stars and praised it as a "confident, sassy declaration" with a "daring acapella opening [that] makes way for a chant-worthy chorus", but criticized the track for its brevity.

[14] IZM's Lim Seon-hee rated the song three out of five stars and described it as an "unexpected" departure from Jennie's previous singles both sonically and lyrically.

The author also noted the lyrics' emphasis on "we" rather than "I" and praised the song as an empowering feminist anthem that "boldly sets up a place of solidarity" for women.

[13] L'Officiel Philippines' Andrei Santos lauded the song for its electrifying and infectious production, positively describing it as "a bold anthem that channels Jennie's unshakeable confidence and carefree spirit".

[15] "Mantra" debuted at number three on the Billboard Global 200 chart with 74.9 million streams and 15,000 sold worldwide in its first full week of tracking between October 11 and 17.

[26] An accompanying music video for "Mantra" was directed by Tanu Muino and released alongside the single on October 11 to Jennie's YouTube channel.

[27] She is shown performing the track in a variety of looks, some with blonde hair, across multiple locations in Los Angeles,[11] including the Petersen Automotive Museum.