By default, protected WooCommerce categories and products are listed in the public store, but customers must enter a correct password to access them.
If you prefer, you can completely hide protected categories (and their products) from the shop. Simply untick the box on the plugin settings page. This will hide them from your main store and other locations such as related products and sidebar widgets.
You can also control whether links to protected categories appear in navigation menus. Public visitors will never know that your hidden categories and their products exist!