WordPress at a glance
action is not described

woocommerce_no_products_found action-hook . WC 1.0

Hook: woocommerce_no_products_found.

Usage

add_action( 'woocommerce_no_products_found', 'action_function_name_2688' );
function action_function_name_2688(){
	// action...
}

Where the hook is called

In file: /templates/archive-product.php
woocommerce_no_products_found
woocommerce/templates/archive-product.php 88
do_action( 'woocommerce_no_products_found' );
woocommerce/includes/wc-template-functions.php 1004
do_action( 'woocommerce_no_products_found' );

Where in WP core the hook is used WooCommerce

woocommerce/includes/wc-template-hooks.php 78
add_action( 'woocommerce_no_products_found', 'wc_no_products_found' );