Amazon Alexa was introduced alongside the Echo devices in November 2014 by the Amazon developers.

Alexa is the voice A.I. (Artificial Intelligence) that’s accessible through the Echo devices.Amazon has designed the Alexa Voice Service to mimic real conversations, but you’re actually using intuitive voice commands to get this service to perform specific tasks.

In 2019, Amazon's devices team announced that they had sold over 100 million Alexa-enabled devices.

It is capable of voice interaction, music playback, making to-do lists, setting alarms, streaming podcasts, playing audiobooks, and providing weather, traffic, sports, and other real-time information, such as news. Alexa can also control several smart devices using itself as a home automation system.

There is also an app that can be downloaded from the App Store, Google Play, and Amazon Appstore. The app can be used by owners of Alexa-enabled devices to install skills, control music, manage alarms, and view shopping lists.

If you want to buy an Alexa Amazon device you can do it from Amazon’s official website: https://www.amazon.com/smart-home-devices/b?ie=UTF8&node=9818047011.