Written and recorded at Jungle City Studios and Electric Lady Studios in New York City, the song is based on a simple beat and an electric guitar sample.

Lyrically, the song is about taking care of a partner for the rest of their lives.

Hugh McIntyre of Forbes found the song "decidedly sweeter and more restrained than his recent offerings", complimenting its ability to not "rely on big electro beats or any gimmicks to sell itself".

Lauren O'Neill of Noisey called the song an indication of "a mellower, more grown-up approach on album two", writing that it showcases "the strong upper part of Zayn's vocal range and falsetto".

"Let Me" is an upbeat pop and R&B track featuring "a slick, easygoing production".

The music video was directed by José Padilha.

US Billboard Hot 100, peak position 73, 2018.

Belgium (Ultratip Flanders) peak position 5, 2018.

Hungary (Single Top 40) reached Number 9, 2018.

Scotland (Official Charts Company) reached Number 21, 2018.