How to Use Alexa App?

What is Alexa App? How to Use Alexa App? How to Setup Alexa Echo Dot? how to download the Alexa app and Alexa Echo setup. Also, Alexa app for windows, Alexa app for Mac, and free Alexa app for android download and Amazon Alexa setup, echo dot setup, etc. You will get all information regarding Amazon Alexa app and echo setup by visiting here