WordPress at a glance
action is not described

woocommerce_before_cart action-hook . WC 1.0

Usage

add_action( 'woocommerce_before_cart', 'action_function_name_9186' );
function action_function_name_9186(){
	// action...
}

Where the hook is called

In file: /templates/cart/cart.php
woocommerce_before_cart
woocommerce/templates/cart/cart.php 20
do_action( 'woocommerce_before_cart' ); ?>

Where in WP core the hook is used WooCommerce

woocommerce/includes/wc-template-hooks.php 307
add_action( 'woocommerce_before_cart', 'woocommerce_output_all_notices', 10 );