Images: Primary and secondary image URLs, plus alt text generated from card details.
Metafields: Game, Set Code, Collector Number, TCGplayer ID if your Shopify theme leverages them.
Uploading to Shopify
Download the CSV and upload it via Shopify Admin → Products → Import.
Preview the import. Shopify highlights any missing required columns before committing.
Complete the import. Shopify emails a status report once processing finishes.
If items already exist, use the Update Existing Products with the Same Handle checkbox to refresh pricing and inventory.
Keep a baseline catalog export saved in your files. If you ever need to revert changes, you can re-upload the known-good version without rebuilding it from scratch.