A lullaby-influenced midtempo pop ballad, Eilish's lyrics within the song address several topics, including her attempting to beg a friend to no longer hide away.

Eilish and her brother Finneas O'Connell were approached by Apple, with the company sending them an early version of a festive commercial entitled "Holiday — Share Your Gifts".

[7][8][9][10] Randall Colburn of Consequence of Sound said the song features "a few gentle guitar notes" and further includes a "gauzy ambiance, and textured percussion" in its instrumentation.

"[8] The positive messages not only illustrated in the ad but the song itself encourage people to embrace their talents and gifts no matter what they may be.

Ivy Sandoval writing for Soundigest, stated "the song encourage[s] people to embrace their talents and gifts no matter what they may be.

Idolator's Mike Nied called the song a "serious win" and said he would not be surprised if "the track dominate[d] streaming services".

[10] Katherine Gillespie of Paper stated that the song is "designed for listening to while staring out the window at falling snow and twinkling lights".

[2] The song was praised by Insider's Claudia Willen, who called the track "heartwarming" and felt its lyrics "[do] [their] best to encourage someone to break out their comfort zone and overcome their fears".

In the video, the characters are scared to show their talents to the world while Eilish sings the lyrics, "You'll never know until you try it/ You don't have to keep it quiet.

"[8] Thomas Smith from NME said the video "interprets those emotions and the resulting clip in the most delicate of ways, allowing hushed vocals to lead the track through to its seismic and life-affirming finale".