The phrase comes from Nintendo's Super Mario series, one of the most recognisable video game franchises in the world, where Mario greets players in his distinctive cheerful voice. As gameplay clips, memes and short-form videos spread online, short voice lines like this one were lifted and reused as intros, reactions and soundboard favourites. Its appeal has lasted because the character needs no introduction, the delivery is instantly upbeat, and the few seconds of audio can set the tone for almost any playful video.