Templates are starter files that have predefined formats, layouts, and designs. This video provides a quick overview of how to get started using templates in PowerPoint 2010. Using a template in PowerPoint takes away one major hurtle of presenting a slide deck - the design aspect. Perhaps you really didn't want to come up with one on your own, or perhaps you were stuck on just how to lay out the details, facts and figures of your proposal - while showing off new features of PowerPoint 2010.
Here's a little project called "Everything in this movie was made in PowerPoint" that shows some of the 167 free Office 2010 online templates available on Office.com.
Following video about 157 free templates that're available for PowerPoint 2007:
To get started using templates in PowerPoint 2010, watch an introductory video: