Market opportunity: SketchUp owner Trimble does not publish updated numbers on the user base for the product, but has cited numbers in the tens of millions of activations in recent years. The product offers a free version and educational discount that makes it popular for students and those working with 3D design software for the first time.Who are we targeting: SketchUp For Dummies, 2nd Edition primarily targets new users and those interested in using SketchUp for personal reasons. The content focuses on the free and lower-cost versions of the software, typically used by makers and others who are not creating drawings as a profession. The secondary market includes the professional side of the product who need a reference or may be switching to SketchUp from a different product.