WordPress at a glance
action is not described

woocommerce_checkout_update_order_review action-hook . WC 1.0

Usage

add_action( 'woocommerce_checkout_update_order_review', 'action_function_name_8420' );
function action_function_name_8420( $wp_unslash() ){
	// action...
}
$wp_unslash()
-

Where the hook is called

WC_AJAX::update_order_review()
woocommerce_checkout_update_order_review
woocommerce/includes/class-wc-ajax.php 300
do_action( 'woocommerce_checkout_update_order_review', isset( $_POST['post_data'] ) ? wp_unslash( $_POST['post_data'] ) : '' ); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

Where in WP core the hook is used WooCommerce

Usage not found.