Every data source has an Import field → Internal PPCDATAFEED field table. Exports, rules and campaign templates always talk about the internal names (title, description, price, sale_price, image_link, availability, brand, gtin, google_product_category…), so the mapping only has to be done once per source.
- Open the data source and click the Mapping tab.
- For each internal field pick the matching Import field from your file. Rows left as “Not selected” stay empty.
- Need a field that does not exist? Click + Add New Internal Field, name it, and map or fill it with a rule later.
- Click Save Mapping. The next update applies it to all products.
The list of mapped fields is also shown in the tooltip of the data source in the list - a quick way to check a source without opening it.