Being part of a workflow task can be painful and time consuming, going back to your email notification, login, click on the task icon, go to the document, review it, etc.
We want to let the Drive users being able to handle all of this through their Drive app.
Notification will be displayed on the Drive icon once a task is assigned to you. You will have to click on it, and you will directly arrive on the document to review.
It will not only work with default workflows but also custom ones.