Google Home is a voice-activated speaker powered by the Google Assistant. Just say "OK Google" or "Hey Google" to ask it questions or tell it to do things. You can have it play music, podcasts, or radio from Google Play Music, Spotify, YouTube Music, Pandora, and TuneIn. You can also ask it general knowledge questions and get weather, traffic, finance, sports, local business information, and more. It can also set alarms and timers.
If you give Google Home permission, it can learn about you and retrieve information about you and your schedule. For instance, it can get flight information, tell you about the traffic on your way to work, and help you plan your day.
Google Home can connect with your smart devices like Chromecast, Nest, and Philips Hue. This means you can ask it to put something on the TV, set the temperature, turn lights on and off, and a wide variety of other tasks using If This Then That.
Google Home even has a fun side -- you can ask it to play games like Mad Libs or tell it "I'm Feeling Lucky" to initiate what sounds like a game show.
Google Home is a lot like the Amazon Echo, but there are differences. Amazon's Echo has been out longer and it has "Skills" that can be added to extend its functionality. Currently, there are more functions that can be added to the Echo, but Google Home will be quickly improving. The Google Home already has an edge over the Echo at answering general knowledge questions.