How to wake up Google Assistant by voice?

With the help of Google Assistant voice technology, you can wake up Google Assistant without the need for manual intervention. You can make calls, send messages, play music, set timers, and do more hands-free.
To wake up Google Assistant by voice, please refer to the following steps:
1. Go to the [Settings] APP on your phone;
2. Tap [Google];
3. Tap [All services];
4. Select [Search, Assistant & Voice];
5. Enter [Google Assistant];
6. Go to [Voice Match];
7. Turn on [Hey Google].
Note:
1. After you turn on Hey Google, access your assistant any time you say “Hey Google”, even if your screen is off;
2. “Hey Google” requires Voice Match to recognize it’s you, so your assistant can tell you apart from others.