Voice User Interfaces have become an increasingly popular way for people to interact with technology.

Voice User Interface (VUI) are interfaces that allow interaction with products and services using voice commands in natural language. VUIs are an essential part of the voice enabled products like Siri, Google Home, and Amazon Alexa.

With advances of speech recognition and natural language processing technologies Voice User Interfaces find their way into mainstream products and enable users to interact with product by simply speaking to them. In some instances VUIs completely replace Graphical User Interface (GUI).

Designing a successful VUI requires careful planning and consideration of various factors, such as the target audience, the purpose of the interface, and the available technology.

When designing for Voice User Interfaces many of the same Interaction Design principles apply. For example, feedback.