This sound is known online from the Japanese phrase "nani kore?" and is commonly labeled with "Gorori" in uploads and reposts. Short clips like this spread through meme pages, reaction edits, and reposted soundboards because the meaning is instantly clear even to people who do not speak Japanese. Its staying power comes from how brief and flexible it is: creators can use it for confusion, disbelief, or a light comedic reaction in almost any format.