Decide whether articles from your ERP that share a ParentSKU should become one product with several items in Geins (for example one product in several sizes).
Yes – the ParentSKU is used as the Geins product article number, and each article's SKU becomes a product item under it. Articles without a ParentSKU stay simple products.
No – each article is created as its own product.
Good to know
When this is on, you can choose how the names are set with Grouped product name attribute and Grouped product item name attribute.