Within Teamwork Desk, a smart inbox allows you to view a list of tickets based on particular conditions.
For example, you could set up a smart inbox to view all of your high priority tickets with a particular tag, or from a particular email address. You can use a single condition or a combination of them.
You will see your smart inboxes listed in the left pane of your tickets screen, above your original inboxes:
You can create a smart inbox that is private to you, or share them so other people can view them too.
For more information see: Creating a Smart Inbox