The default reviewer will be the workflow owner
Click on the pencil to change the default reviewer or add more reviewers. You can add as many reviewers as you like. Once one of them acts on the request, it is considered done.
Tip: The email address is saved if it has turned grey. If it doesn't turn grey hit Enter or Return on your keyboard after each email entry.
Once you have added all your reviewers, click Update.
To add Conditional approval reviewers inside a step, click the + button
Enter the conditional approval criteria and Reviewer(s). You can add multiple Conditional approvals & Reviewers for each approval step.
If conditions are met only the email(s) specified for this condition will receive the email to act on request.
As soon as one of them acts on it (approves it, declines it, puts it on hold, or sends it back to the requestor), the request is closed to the others.
If conditions are not met the request for approval email will go to the default reviewer(s).
Our blog post here: http://goo.gl/UUh67f explains the process in details
Click on the X to close the window and return to approval steps
Repeat to add as many approval steps and reviewers as you need.