This is a custom dimension of the type "Product Category". Here static information on a product is collected.
"Viewed" means that only products with the product status "view" are tracked.
Each metric combined with this dimension relates to viewed products.
Hint: "-" classifies all products that are not assigned to a product category.
Unfortunately, we cannot provide further information on this analysis in the Support Center, as each product category is configured in your Mapp Intelligence system.
For further questions please contact your administrator.