This sound is known online as the 'nya arigato' meme and is mainly shared as a short reaction clip in meme posts, reposts and edit culture. It became recognizable through its cute anime-style delivery rather than a widely documented mainstream source. People keep using it because the phrase is simple, easy to place after a joke, and instantly signals playful thanks. It often appears in the same style of edits as other exaggerated anime reaction sounds, including anime wow, where a brief voice clip becomes the whole punchline.