4.1 What is an Alexa Skill?

Voice apps created for Amazon Alexa devices are called Alexa Skills. Skills are voice-driven Alexa capabilities. 

You can enable and disable Alexa skills, using the Alexa app, the web browser, or even vocally whenever possible, in the same way, that you install and uninstall apps on your smartphone or tablet. 

You can add Alexa skills to your Echo to bring products and services to life.