Commerce sites may use the grouping-by-product feature to collapse all SKU results associated with a given product into a single result. In order to use grouping, you indicate in the configuration of your Search Index Output Configuration file that you want to index by SKU rather than index by product.

In order for grouped items to display the way you prefer in Search Testing, make the necessary configurations described in Displaying SKUs Grouped by Product.

By default, if you index by SKU, your items will be grouped. To view results as ungrouped, you need to disable grouping in Search Testing, as described in Disabling Grouping. Grouping is unavailable if you index by product.