Interactive Voice Response (IVR) is a technology that allows callers to interact with a phone system through voice or keypad inputs. It is commonly used in customer service to route calls, provide information, and automate tasks without the need for a human operator. IVR systems can handle various functions, such as checking account balances, making reservations, or providing updates. By using pre-recorded messages and menus, IVR helps streamline communication and improve efficiency for businesses and their customers, reducing wait times and enhancing user experience.