What is the purpose of the rear skewer on a bike and how does it contribute to the overall functionality of the bicycle?

The rear skewer on a bike is a quick-release mechanism that secures the rear wheel to the frame. It allows for easy removal and installation of the wheel, making it convenient for maintenance and transportation. The rear skewer contributes to the overall functionality of the bicycle by providing a secure connection between the wheel and the frame, ensuring smooth and efficient riding.