In an interview with People, Kelly said "Missin U"is about missing somebody, but it's also, just so inspired by the early 2000s, late '90s.

[1]Though "Missin U" includes Kelly's "signature vocal acrobatics and chill-inducing runs",[2] People's Jack Irvin highlighted how "missin u" departs from Kelly's typical style of "sweet melodies and strumming the guitar".

[1] The official music video for "Missin U", directed by Marc Klasfeld, was also released the March 17, 2023.

Billboard said the video "serves up Y2K Fantasia and "takes cues from Aaliyah, Missy Elliott, Destiny's Child and more.

"[2] People's Jack Irvin highlighted how the "Y2K-themed retrospective video", which included "clips from throughout her decade-long career, giv[es] listeners the space to reminisce before following her into a bold new sound".