The gong is a traditional percussion instrument used for centuries in East Asian ceremonies, temple rituals and orchestral music, valued for its sustained metallic tone. Recordings of a single strike became a staple sound effect in film, television and radio for signaling beginnings, endings and dramatic announcements. Online, creators adopted the clip as a versatile transition and reaction sound, using its recognisable resonance to add instant ceremony, tension or comedy to short videos, streams and edits without needing a full musical cue.