/**
 * Reorder product data tabs
 */
add_filter( 'woocommerce_product_tabs', 'woo_reorder_tabs', 98 );
function woo_reorder_tabs( $tabs ) {

    $tabs['description']['priority'] = 5;            // Description first

    $tabs['reviews']['priority'] = 10;            // Reviews second
 
    $tabs['additional_information']['priority'] = 15;    // Additional information third


    return $tabs;
}