Workflow allows you to model and track any your business processes: e.g. issue/bug tracking, customer approval, help desk, risk tracking etc.

You define the process and business rules.

Increase efficiency -- users are notified of activities.

Custom attributes -- eg. Version and Browser and Platform attributes can be added to a Bug.

Timeouts -- delayed activities are flagged and email notifications are sent.

Automatic Routing -- e.g once a bug is fixed it can either be marked Closed or Failed.

Initiate via email -- e.g a support request process can be initiated by a form on your web site.

Powerful reporting engine.

Role based security