This is a very cool feature! My wife and I have an Echo Dot in our home. We are not into home automation yet, but we like to play around with the Echo. The Echo devices all run off the Alexa App. Sometimes giving Alexa voice commands can be a bit cumbersome. Enter Alexa’s Followup Mode which allows you to string several commands together, one after the other without saying “Alexa” each time. This article explains how to activate this in the Alexa App. I activated it immediately, it is a real time saver.