Skype grew into one of the most widely used internet calling and messaging services of the 2000s and 2010s, and its Windows desktop client gave everyday actions their own small audio cues. The message sent chime was one of those cues, heard millions of times in homes, offices and classrooms as people chatted through the day. As Skype faded from daily use, the sound survived on soundboards and in edits, where it now works as instant shorthand for an old-school chat. Like a Discord notification, it tells viewers a message has been sent without needing any on-screen text.