The song is performed in the key of F minor with a tempo of 94 beats per minute in common time.
Guetta and Sia have previously collaborated on the tracks "Titanium", "She Wolf (Falling to Pieces)", "Bang My Head", "The Whisperer" and "Helium".
Roisin O'Connor of The Independent said: "The track is classic Sia, starring her incredible voice and a big, emotive chorus; it's an uplifting, low-key banger that shows off the maturity Sia has brought to previous Guetta tracks, along with his talent for an infectious beat."
Mike Nied from Idolator called it "an inspiring anthem complete with a rousing production and another of the 'Chandelier' siren's jaw-dropping vocal lines."
Brittany Spanos of Rolling Stone described the song as "uplifting": "On the song, Guetta goes for a less clubby sound than usual. The song is more earnest as Sia offers words of encouragement to a loved one weathering a tough time."