“Knock Knock” is the concluding track to SoFaygo’s fifth mixtape, Angelic 7. The track acted as a promotional single before later being added to the album. On the track, Faygo details his lavish lifestyle, mentioning exotic vehicles and his influx of money and women.

Cole Bennett of Lyrical Lemonade later directed a music video for the track, which was subsequently released on May 3, 2021.