This is the simplest form of IVR. In this type, you can only add a single layer of IVR to your call flow. Single level IVR is perfect for simple use cases where one input is enough to connect an agent or trigger a message.
Multi-level IVR
You can think of multi-level IVR as an IVR within an IVR. Sometimes it’s unmanageable to create an IVR menu with a 0-9 prompt. In this case, you can use multiple layers of IVR in your call flow to streamline the workflow.