Skyline is one of the built-in notification tones shipped on Samsung Galaxy phones, recognisable for its soft melodic chime. The extra reverb version is a user-made edit that circulated on meme soundboards, where familiar phone, game and TV sounds get stretched for comic effect. It belongs to the same trend as fart with reverb and other over-processed one-shots shared for edits and group chats. Its popularity comes from recognition, as almost everyone has heard the original tone at least once in daily life.