This sound comes from D.Va, the Korean pro-gamer-turned-mech-pilot character in Blizzard's Overwatch. Her use of short Korean voice lines helped make clips like this memorable among players after the game's 2016 release. Online, the greeting spread through highlight edits, fan compilations, and streamer content because it is instantly recognizable and easy to drop into very short cuts. It still gets used in gaming memes and intros thanks to D.Va's popularity and the clean, one-word delivery.