Create A Copy of the "Ad Matrix DOWNLOAD" Sheet
https://docs.google.com/spreadsheets/d/13Z1O0B2nOk-BeHbDvbjbIzfiSgfhtxFKsZtkXxcsnOk/copy
Optionally, you can use this template with space for client feedback:
https://docs.google.com/spreadsheets/d/12etwVpGeL_6Z7fgxn9YYo8R1tvYdV7SgeVu6hrict6E/copy
Create a copy of your "Ad Matrix UPLOAD" sheet.
Go To Your New "Ad Matrix DOWNLOAD" Sheet.
In Cell A1 of the "Sheet To Import Data From" tab, paste the URL for your "Ad Matrix UPLOAD" Sheet.
Cell B1 on that sheet should return an error. Click on Cell B1 and click “Allow Access.”
Then go to your new "Ad Matrix UPLOAD" sheet.
Paste the link to your "Ad Matrix DOWNLOAD" sheet in Cell C8 (this is more for convenience than anything else, so not a big deal).
Cell C9 on that sheet should return an error. Click on Cell C9 and allow access.
Instructions for how you can use the sheet are on the first tab of the Upload file
Don't forget to delete the "Sheet To Import Data From" tab after downloading as an Excel file.