You can tell Google Assistant to call people, get directions, send messages, set alarms. Or, ask questions.
Get your assistant's attention by doing any of these:

Ask a question or say a command. For example, you can say “What's the weather today?” or “Set alarm for 7 AM tomorrow.”
To silence Google Assistant when it's talking to you, tap 
Google Assistant will stop listening after a few seconds.
To learn about changing settings for Google Assistant, read Google's help.
Open the Google app 

If your phone isn't recognizing “Hey, Google” commands:
Is Battery saver on?
If it's on, you need to get your assistant's attention by touch instead of voice, or turn off Battery saver.
If it's off, then follow the remaining steps.
