https://medium.com/msing051/privacy-matters-on-smart-speakers-6e2b36ca70d2

Voice is becoming the main interface. It exists in many of the technologies we use everyday, such as home appliances, cars and mobile apps. We turn off the lights, order food, buy weekly groceries, or listen to your favorite recordings, all with one of the most natural technical interfaces — voice. This feature is provided by smart speakers such as Amazon Echo, Alexa, Google Home and Apple HomePod.

Speech recognition technologies like Apple’s Siri have been popular for some time now. However, smart speakers are game changers. Based on voice-activated artificial intelligence, smart speakers connect to third-party IoT devices such as thermostats or doors, allowing you to control your surroundings with sound. Smart speakers try to be your virtual assistants; they change how you interact with your home, your smart device, and even your favorite brand.