This sound is based on the Shrek character, whose voice became a lasting meme reference online thanks to the franchise's huge cultural reach. Short greeting clips like this spread through soundboards, meme pages, and short-form video edits because they are instantly recognizable even in just a few seconds. It stays popular because Shrek is widely known across age groups, and a simple greeting in that voice can turn a normal entrance into a joke. Online, it is often used the same way as a quick bruh reaction.