This is one seriously powerful app. It also works on most Android devices. You simply download the app and then enable it. From there, you can ask it whatever you want. It also supports a variety of commands. You can control smart home products, ask it just about any question, and it can even do simple math problems for you. It’s included with a variety of products such as Google Home speakers.
There is also a second Google Assistant app for those who want a quick launch icon on the home screen. The hardware stuff costs money, but Google Assistant is free.