A rotating proxy server provides a lot of great benefits over a normal single proxy server, because it does ip address rotation. This helps you hide your ip address in a similar fashion to TOR, so that each request you make goes through a different, random ip address. A proxy rotator is also more reliable, because it can ignore proxy servers that are not working.
ProxyMesh is an ideal ip rotation service because it handles the proxy rotation and rotating ip addressess for you. It is a proxy server that changes ip addresses. You don't need to do any special configuration or download an app to use the ProxyMesh ip changer proxy, and every 12 hours, new ip address are rotated in and old ip address are rotated out.