Hey Millicent Klipsch! You can already create tags in bulk in Purvey.

From the left pane, select Amazon Seller Central (or Amazon Vendor Central) -> Catalog -> Catalog

Once the page loads, you can hit the Import button (1) which will bring up a window with instructions.

From there you have to download the template (2), fill it out, and upload it (3).

Please let me know if everything works as expected!