The sound became standard as YouTube creators adopted animated subscribe buttons in outros and intros during the 2010s, after the platform introduced the notification bell alongside subscriptions. Clicking the bell meant viewers would receive alerts for new uploads, so creators began pairing the action with a clear ding to make the instruction memorable. Templates for editors spread the same chime across millions of videos, turning it into a shared cue that audiences now recognise instantly, even when it appears in parodies, tutorials, or videos posted on other platforms.