Few things are harder to put up with than the annoyance of a good example.
So far, you've seen examples of what desktop GIS can do, how it works, the kinds of questions it can answer, and how you can use it to present information as maps, tables, charts, and more. Now it's time to see a real desktop GIS session with real data being applied to a realistic problem in a realistic situation. The situation may not be your situation, but you will be able to appreciate the process, the steps involved, and the specific GIS tasks performed. You need to know who is most likely to need your goods or services, and where these potential customers can be found. Once you know where your best customers are, you want to know where to put your business.