Are you familiar with that lovely voice telling you to ‘Press 1 for Sales, Press 2 for Help?' The tool that makes that possible is called Interactive Voice Response (IVR).
IVR is an automated telephony menu system that interacts with callers, gathers information, and routes calls to the most appropriate people within your team. IVR works with a combination of pre-defined options (which you can create with Flow Builder) and touch-tone keypad selection. IVR enables responses and actions in the form of voice, callbacks, contact management, email, SMS, and more.
Take a look at this article to learn how to build an IVR menu with Flow Builder.