Google Docs Edit Notifications

In Google Docs, you can now choose to receive email notifications for document changes. 

Edit notification emails detail what changes were made, when the changes were made, and who made them. Edit notifications are off by default and can be enabled on a per-document basis. When enabled, you will be notified when anyone adds or removes content from the document.

You can configure these notifications in Tools > Notification settings.

The Notification settings dialogue box has options that can be adjusted as needed.