Make Google Docs work harder for you with these tips
An addition to comments within Google format files (e.g. Docs, Sheets, Slides etc) are Action Items.
This gives you the ability to assign a specific task to a colleague within the file and generate an email notification. You can also re-assign an action item to another user.
Also Docs will intelligently suggest an Action Item to assign to the right person, thanks to Natural Language Processing (NLP).