The album conveys a message about self-esteem and confidence by discussing topics about finding self-confidence, loving, enjoying, and figuring out oneself as an adult, using a more light and comical style that has a less serious tone compared to the group's previous releases.

On April 18, 2023, Cube Entertainment announced the group's comeback on May 15 by releasing a video teaser with style resembling that of a trailer of a series.

[7][8] On the following day April 27, the group released a video with the title "Spoiler Alert: [I feel] #Yuqi" that showcased snippets of the fourth track, "All Night".

[16] On May 9, 2023, Cube uploaded five individual teaser photos for each member of the group on their social media accounts, confirming the release of track two "Allergy", on May 10.

In addition to the members, a variety of songwriter-producers also participated, including longtime collaborators such as Pop Time, BreadBeat, and Siixk Jun, with whom the group has worked on previous songs.

[23][24] "If we had done music that taught and gave lessons before, this time we wanted to express the songs [message] with a light and comical point along with the motif of the movie I Feel Pretty.

According to Soyeon, the subject matter of I Feel revolves around conveying a message about self-esteem and confidence, of which the latter two are recurring themes in the group's previous work .

[27] The opening track, "Queencard" is characterized by a "newtro vibe"[28] where its lyrics talk about a person who "realizes that true beauty comes from self-confidence after finding out that even the queen bees have their own insecurities and compare themselves with others".

[20] The second track, "Allergy", is a pop-punk song[29] with lyrics that expresses the double meaning of wanting to love themselves while they resent themself by comparing themselves to others.

[31] The fifth track, "Paradise", is an emotional electro-pop, synth and pop ballad song built around a "catchy" acoustic guitar riff and a groovy swing beat.

[26] Followed by the closing track, "Peter Pan", is a minimalistic song[31] built around a "bright" instrumental including acoustic guitar, strums and snapping beats.

It was highlighted how the group was heavily involved in the album's creation, with members Soyeon, Minnie, and Yuqi leading in songwriting, composing, and production.

They also highlighted the album "relatable" themes like social media anxieties and self-confidence, showcasing the group's growth alongside their fans.

[34] In South Korea the EP surpassed one million copies in pre-orders on May 14,[35] due to this, Cube Entertainment is predicted to exceed their total consolidated sales for the first half of 2023.

[38] According to the International Federation of the Phonographic Industry (IFPI)'s Global Music Report for 2023, I Feel was the fourteenth best-selling album worldwide, having sold 2 million units.

[41] In the Cat version, (G)I-dle exuded a chic expression and a mysterious atmosphere, with the group showing off their "strong chemistry" by lying on the bed while "enjoying" their leisure time.

[45] On the same day the group also held a live event at Chosun Palace Gangnam, Gangnam-gu called "production presentation" to introduce the album and its songs, including "Queencard".