Sleigh bells were originally practical safety bells attached to horse-drawn sleigh harnesses in the 18th and 19th centuries, warning pedestrians that a quiet vehicle on snow was approaching. Their jingle became inseparable from Christmas after sleigh rides were celebrated in winter songs, most famously in Jingle Bells, written in 1857. In film, cartoons and advertising the sound quickly became shorthand for Santa's reindeer and festive travel. Online, creators reuse the recording year-round as an audio cue for anything snowy, magical or holiday themed.