I need to know if there is a private notes section on a product page for my eyes only.
Many of my products have multiple SKU's, UPC's, etc and rather than spending a lifetime reorganizing the Excel sheet from each supplier, it would save me time to simply mark these multiple numbers and codes on a private notes section that will appear (for my eyes only) when a customer places an order for the particular product(s).
There is no place in the Shopify admin to store this type of information. You could place this information in a product metafield. In order to view and manage that from the admin UI you could use a Chrome extension called ShopifyFD: http://shopifyfd.com/
If you need to update these metafields in mass through an import I recommend using the Metafields2 app: https://apps.shopify.com/metafields2
If you need something more extensive than that a custom Shopify app might be required.