MSN Messenger was Microsoft's hugely popular instant messaging service in the early 2000s, when chatting from a home computer, custom emoticons and nudges were part of everyday teenage life. Its voice call alert became closely linked to that era, and as the service closed and users moved to newer apps, the sound survived in memory. Today creators reuse it in nostalgia edits, reaction videos and memes about the old internet, because a few seconds is enough for viewers who used MSN to recognise the platform instantly and feel the era return.