WordPress at a glance
action is not described

woocommerce_product_additional_information action-hook . WC 1.0

Usage

add_action( 'woocommerce_product_additional_information', 'action_function_name_6365' );
function action_function_name_6365( $product ){
	// action...
}
$product
-

Where the hook is called

In file: /templates/single-product/tabs/additional-information.php
woocommerce_product_additional_information
woocommerce/templates/single-product/tabs/additional-information.php 30
<?php do_action( 'woocommerce_product_additional_information', $product ); ?>

Where in WP core the hook is used WooCommerce

woocommerce/includes/wc-template-hooks.php 201
add_action( 'woocommerce_product_additional_information', 'wc_display_product_attributes', 10 );