Several product reports are available that allow you to determine the most popular products and check their availability for order processing, etc..
The product reports list:

This report shows the top viewed products and the view count for each product with product id and product name.
This report shows an overview of ordered products. Only products from orders with the payment status RECEIVED and the order status COMPLETED will be shown for the set period.
This report shows an overview of ordered products. Only products from orders with the payment status RECEIVED and the order status PROCESS will be shown for the set period.
This report shows the overall inventory per vendor or for all vendors. The product’s inventory is split by attribute, if applicable.