Why does the horse gives harness bells a shake?

The horse gives harness bells a shake to signal its presence and to create a festive or cheerful atmosphere while pulling a sleigh or carriage. The sound of the bells can also help alert others to the horse’s approach, making it safer for both the horse and those nearby. Additionally, the jingling bells add to the overall charm and enjoyment of winter activities, enhancing the experience for riders and onlookers alike.