The Site Inventory tool downloads all the pages on your site to a spreadsheet. The information in this spreadsheet, along with analytics for your site, will help determine and keep track of what pages should stay, any changes in folder structure, and what pages may need to be eliminated. The result will be a solid site map that will aid greatly in your site build.
Running the Report
eHC has documentation on how to run this report. You will need a dotCMS login in order to run the report. If you do not have access to run the report, a member of the eHC team will be able to run the report for you.