https://www.cnet.com/news/amazon-alexa-location-based-routines-will-turn-your-lights-on-as-soon-as-you-get-home/

With location-based Routines, you can set up connected lights to turn on as soon as you arrive home, for example. 

After Amazon first launched the original Echo in 2014, the device became a hit for the company and helped usher in a new era of voice computing. Now Apple, Google, Samsung and Microsoft are racing to build up their own voice assistants and integrate them into more devices to catch Amazon. To stay one step ahead, Amazon aggressively expanded its line of Echo devices, pushed Alexa into hospitality and office spaces, and integrated Alexa with over 20,000 kinds of devices.