When activating this option the functionality with offline courses will be disabled automatically allowing you to use WooCommerce products as intended.
Follow the link for the full WooCommerce documentation: http://docs.woothemes.com/documentation/plugins/woocommerce/getting-started/ WooCommerce settings: https://docs.woocommerce.com/document/configuring-woocommerce-settings/​
Follow the link to learn more about WooCommerce products: https://docs.woocommerce.com/documentation/plugins/woocommerce/getting-started/setup-products/​