Implementing workflows are very importent while manageing content. We can use it for approval purposes, but there are also a number of other possibilities.
Some other examples:
- Automatic processing of information
- Haversting feedback
- Keep track of documents and records in your system
David Chappell, wrote a whitepaper about Understanding Workflow in Windows SharePoint Services and the 2007 Microsoft Office System.
This document describes how to implement workflow in Microsoft Office SharePoint Server 2007.