Short greeting sounds like this one have become staples of online soundboards because they need no setup or backstory to be understood. A simple hey what's up works in almost any language community where English internet slang is common, and it can open a stream, greet a chat, or punctuate a joke without interrupting the flow. Its popularity comes from that flexibility: creators reuse the same two-second greeting across gaming videos, reaction edits and social clips, where a familiar, informal hello instantly signals that something relaxed and funny is about to follow.