The phrase became a cultural shorthand for email in the 1990s, when mail services announced new messages aloud instead of showing a silent badge. It later spread through reaction videos, memes and soundboards as an easy way to mark a message arriving, and it remains in use because almost everyone recognises the announcement instantly, even without seeing a screen. For creators, that familiarity turns a simple notification sound into a punchline about waiting, checking and finally hearing back.