WooCommerce Order Approval plugin allows shop owners/admin to approve or reject the orders placed by customers before payment is processed. If the order is accepted by the admin, an email with a payment link is sent to the customer. If the order is rejected by the admin, a cancellation email will be sent to the customer. Administrators have the flexibility to set preorder options for all products, on a per-product basis, or configure them globally based on categories and tags. Furthermore, they can refine these settings by combining categories and tags, providing comprehensive control over the preorder process.