How to Enable Notifications for Shared Google Docs

On your computer, open a document, drawing, spreadsheet, or presentation.
Go to Tools > Notification settings
Under “Comments,” choose when you want to receive notifications:
- All comments: You'll be notified about all new comments.
- Comments for you: You'll be notified about @mentions and threads involving you.
- None: Never receive emails about comments for that file.
The screen should look similar to the one below