From Reports > Transction History > Select the Products tab

Transaction History – Products
Product Performance #
(From Reports > Transction History > Select the Products tab > Search for a product > Click the lightning icon)
Use Product Performance gives you the distribution percentage between your customers, here you can see that 50% of an item is only bought by a single customer, and 92% of this product is bought by the first two customers.
ACTION POINT: Advertise this product to more customers

Product Performance