The order number is the WooCommerce order id, which is the WordPress post id. It is not sequential. The extensibility of WordPress comes in part from its "custo

The order number is the WooCommerce order id, which is the WordPress post id. It is not sequential. The extensibility of WordPress comes in part from its "custom post types", so any WordPress plugin that uses a custom post type contributes to incrementing this number. E.g. if I write a logging plugin that stores entries as a custom post type, or a mail fetcher, or an obvious example is the products listed on the store itself, if they cumulatively came to 57188, then this is the first order on the site. The order number is a poor indicator of the number of orders.