Creating a geometric shape is very easy. All you have to do is draw a rectangle with the pencil tool and drag it with the mouse to add volume. After that, you can create windows, doors and all other shapes you can think of. It also lets you include colors and textures in your models. If you're not good at creating your own models, the program also includes a huge database with resources that have been created by other members of the community and which you can use for free, they include all kinds of things, from furniture, to human figures and any other kind of decorative element.
SketchUp lets you export your creations to different graphic formats, such as JPG, BMP, TIFF, PNG for 2D and 3D rendering, DEM, DDF, DWG, DXF, SKP for object and 3D scenes. It also lets you render moving video scenes in MOV and AVI.
Its a multi-purpose tool for both industrial design, architecture and decorating. Plus, the application has been designed so that you an upload your models onto Google Earth and thus share them with the rest of the program's users. If you can create a 3D image of a building or monument in your city then you're the type of person who should be using SketchUp.