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The product code is used as the identifier so must be a code which exists in the catalogue. You won't be able to upload product info for a product not in the catalogue.
Simply download the template, complete the required data and upload it.
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Here is an example of how the data might look. Please note column B is not required to be completed but is completed in this example for clarity:
Graphic String
If you are wanting to upload images to be seen when the site is placing an order, you will need to add the image as a url into the GraphicString field in column D.
The data will look something like this:
When ordering the user will see a small icon:
They can click on the icon and it will show a larger image plus additional info added.
Once uploaded what will the user see?
The user will see the below info if they click on the Product Information button at the point of ordering:
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