Smart Speakers and displays
A smart speaker is a wireless, voice activated device that uses integrated virtual assistant software to obtain information or perform tasks and provide the results aurally for the user to hear. A smart display does the same thing but presents its results visually on a screen in addition to through a speaker.
Smart speakers and smart displays are always "on" and listening for their virtual assistants' activation words (such as "Cortana" for Microsoft products, "Google" for Google ones, "Siri" for Apple, and "Alexa" for Amazon). The virtual assistant software is interactive (it can ask you to clarify a request, for example) and attempts to learn as it goes so each new request is more likely to be understood.