SKU or the Stock Keeping Unit is needed for tracking the stock of a particular product. By default the SKU number is displayed on the product detail page in WooCommerce shops. However, if you want to hide it from the product detail page, so that it is available only for backend use, you must edit the code of the theme. Modifying the code is a job of experts. Contact us if you wish to remove the SKU number from the product detail page.