In a nutshell, an auditor wants to assess if you said what you did and if you did what you said.
Well, it might be a bit more complex in certain situations, but it mostly boils down to this for the majority of times. Of course, each audit situation requires analysis and preparation, and far from us the intent of taking this subject lightly.
Producing a complete certification report fir an audit is simply a matter of clicking on 'produce report' for the selected project. You can print the report as an html document or as a pdf file.