Alexa is an Amazon-owned voice assistant app (and accompanying website) that allows you to control your smart home devices, search the web, and access various services such as music and news. Using voice commands, you can ask Alexa to play music, give you the weather forecast, set reminders, check your calendar, and more. Alexa can also be used to control compatible smart home devices such as lights, thermostats, and other appliances. The Alexa app (or website) also provides analytics, such as which commands are used most often, so you can see how you’re using Alexa and adjust your settings accordingly.
It is also a great statistics search engine like Alexa.