"I Finally Understand" (stylized in lowercase) is a song by British singer Charli XCX, released on 7 May 2020 as the third single from her fourth studio album, how i'm feeling now.

"I Finally Understand" is a UK garage and Baltimore club-influenced[1] electropop[2] and Eurodance[3] song described as an "ode to her boyfriend".

Ahlgrim wrote that the song was "super catchy, cleaner and more minimalistic than much of the album, and very strong lyrically", while Larcocca found that the track's "steady beat throughout [reminded her] of Grimes' 'Oblivion'", in addition to "[loving] how completely overdramatic Charli is about finding a love so strong".

called the track an "excellent tune from her endless catalogue of hits" as "Charli XCX's seemingly unstoppable pop reign continues".

[2][12] Josiah Skallerup, writing for Riff Magazine, called the song "one of the most poignant shelter-in-place tunes, built out of a drum-and-bass loop", as the "song chronicles a myriad of feelings that are likely coming up for many of us—insecurity, depression and anxiety—as well as the potential we all have to break through those feelings to heal by tapping into some personal reflection and growth" during quarantine.