[8] Musically, "Up" is a dancehall-influenced pop song,[9][10] featuring Inna singing about what Anna-Kaye Kerr of Urban Islandz described as "overcoming past hurt and disappointment [and] opening her heart up again", as well as about "a love that lifts [her] up when everything in life seems to be going in the opposite direction", as noted by Adevărul's Maria-Alexandru Mortu.

[9][11] According to Rolling Stone India writers Anurag Tagat and David Britto, "the rhythms are a nod to both Romanian as well as Caribbean traditional music.

[12] "Up" became popular on Shazam in multiple countries upon release,[15] and originally reached a peak of number 51 on the last issue of Romania's Airplay 100 chart on the week ending 28 November 2021.

[16] The song eventually reached the top position on the airplay chart published by Uniunea Producătorilor de Fonograme din România (UPFR) on 28 December 2021, becoming Inna's fifth single to peak at number one in Romania after "Hot" (2008), "Amazing" (2009), "Diggy Down" (2015) and "Bebe" (2020).

Alexandru Mureşan was further hired as the director of photography, while the make-up was done by Anca Buldur, the hair by Adonis Enache and the outfits selected by RDStyling.

[9][28] The music video opens with Inna walking into a room filled by partying people, wearing a black bodysuit with a transparent top.

Further interspersed shots show Inna wearing a red outfit with oversized shoulder pads and red glasses as the sentences "Que nadie te limite me decía" ("Let no one limit you, he told me") and "Más de este amor ya no puede, puede ser" ("More of this love can no longer be, it can't be") are displayed on the screen, as well as show her sitting on a chair staring into the distance with other women behind her.

[29] To further promote the song, Inna performed the track live along with "De dragul tău" (2021) during the final of the first season of the singing competition SuperStar România on 17 December 2021.