re-ordering-product-data-tabs.php

/**
 * Reorder product data tabs.
 */
function wb_woo_reorder_tabs( $tabs ) {

	$tabs['reviews']['priority']                = 5;           // Reviews first.
	$tabs['description']['priority']            = 10;          // Description second.
	$tabs['additional_information']['priority'] = 15;   // Additional information third.

	return $tabs;
}
add_filter( 'woocommerce_product_tabs', 'wb_woo_reorder_tabs', 98 );