Notification Settings for Google Docs & Sheets

You can set notifications 

To change comment notifications for a specific document in Google Docs:

• open the document
• click the text bubble icon on the top-right:click the bell icon in the next menu: 
• click the bell icon in the Comments dialog box:
• here you can set notifications according to your preferences.  

Important Notes:

• The Comments dialog box looks different in Docs vs. Sheets, but still functions the same way.

• This setting change is specific to the individual file you are working on and will not affect other documents.

• You generally need to be on a computer to access these settings; this feature is often not available on mobile devices.