Scenes in SketchUp can be used for many things, but they're most commonly used to save camera views. If you have two or more scenes, you can create an animation.
I recently mentioned that SketchUp scenes also appear in Google Earth (see this post) - something I can't believe I didn't know about before (hey, nobody's perfect). This week, AECBytes published my article on this topic. For this article, I created a building in Washington, DC, made a few scenes relative to existing landmarks, and imported the model into Google Earth. This video (no audio, don't adjust your speakers) shows what's it all about:
If you give this a try yourself, and create an interesting tour in Google Earth, please let me know (firstname.lastname@example.org). I'd love to post a few examples of what others come up with!
Anyone can design anything in 3D! www.3dvinci.net