The attendee export is a way to gather important attendee information into a spreadsheet (.csv) file.
You can access it by:
Navigating to the Attendees page in the admin settings of your tournament
Click the Export button on the top right
This will automatically download a .csv file, which you can open in any spreadsheet viewing application
The attendee export will provide the following information for each registered user:
Location information gathered through registration (requires you to enable Location Information in Registration settings)