Amazon has rolled out a new feature, which gives its Echo speakers the ability to listen to back-to-back commands for the assistant. When you switch on Alexa's Follow-up Mode, your Echo speaker will continue listening for a second command for a few seconds after you issue the first one -- no need to wake it up again by saying "Hey, Alexa." You'll know for sure if the device is listening if its blue indicator is on.
It's nice to see the updates keep rolling out for Alexa keeping it a few steps ahead of Google and Apple.