Interactive voice response (IVR) is a technology that allows a computer to interact with humans through the use of voice and DTMF(dual tone multi frequency) tones input via keypad. … The term voice response unit (VRU-voice response unit), is sometimes used as well.

IVR is used by many companies & government organizations to assist their customers.

IVR used for mobile purchases, banking payments and services, retail orders, utilities, travel information and weather conditions etc. it connects user directly to company database or connect user to relevant department by pressing number keys on phone.