SketchUp MAKE is the free version of SketchUp. It is for hobbyist use and is somewhat limited in capability. Especially in terms of import and export but also in regards to some of the tools. SketchUp Pro as more capability with more import and export options. LayOut is included in the Pro package. It is designed to take the models you draw in SketchUp and create documentation such as construction docs, permitting docs and presentations. It has dimensioning and other text tools and also accepts images and other content. Once your project is ready in LayOut, you can export a PDF file which can be sent off to the city, your contractor or whomever.
Due to the way the SketchUp file and LayOut file are linked together, if you need to make changes to the SketchUp model, those changes can be automatically propagated to your document.
It’s also simple to create scaled drawings from your model so that someone can measure dimensions right off the print out.