Select Tab Delimited (.txt) for a pre-formatted Google Base data file.
It is recommended that you select CSV for an Excel type document (then, follow Google's
documentation for editing, formatting, and uploading). Go to "base.google.com" for
more details.
For use when your Custom fields contain data such as UPC, Brand, MPN, etc. After exporting, rename your column headings in Excel to match, Contact
Google for assistance.