The charts in CollabNet TeamForge provide a variety of graphical windows on your project's progress. You can print these charts, import them into presentations, or send out links to them.
Charts are a complement to the data in your planning folder, not a substitute for it. Each chart is good for a quick update on a particular kind of information about your project. For the fullest picture, consider all the charts in context, and always check your impressions by inspecting the detailed information contained in your tracker artifacts and planning folders.