Alexa is the voice of Amazon smart speakers, and as an AI voice assistant, it’s right up there with Siri and Google Assistant. In fact, in some devices, Alexa works alongside both, giving users a sort of back-up intelligence system. Although she plays well with others, Alexa works quite nicely alone. For those who are new to the world of Alexa, here are three great things you should know about it: 1) Alexa can guard your home when no one is home, and alert you to suspicious activity. It can also give you delivery notifications, among other standard smart-speaker functions. 2) When quiet is a must, Alexa can speak in a whisper. 3) Despite its Amazon connection, Alexa also works with Apple Music.