Discord began in 2015 as a chat and voice platform for gaming communities before growing into a widely used app for friends, study groups and creators. Its default message notification became one of the most recognisable sounds online because users heard it constantly while gaming, streaming and chatting. Clips of the short ping spread through TikTok, YouTube and Twitch edits, where it now works as instant shorthand for a new message arriving. It remains popular because almost anyone who uses the app recognises it immediately, even without seeing the screen.