WordPress at a glance
action is not described

woocommerce_helper_connected action-hook . WC 1.0

Fires when the Helper connection process has completed successfully.

Usage

add_action( 'woocommerce_helper_connected', 'action_function_name_4359' );
function action_function_name_4359(){
	// action...
}

Where the hook is called

WC_Helper::_helper_auth_return()
woocommerce_helper_connected
Plugins::finish_wccom_connect()
woocommerce_helper_connected
woocommerce/includes/admin/helper/class-wc-helper.php 796
do_action( 'woocommerce_helper_connected' );
woocommerce/packages/woocommerce-admin/src/API/Plugins.php 572
do_action( 'woocommerce_helper_connected' );

Where in WP core the hook is used WooCommerce

woocommerce/includes/tracks/events/class-wc-extensions-tracking.php 21
add_action( 'woocommerce_helper_connected', array( $this, 'track_helper_connection_complete' ) );
woocommerce/packages/woocommerce-admin/src/Features/Onboarding.php 75
add_action( 'woocommerce_helper_connected', array( $this, 'send_profile_data_on_connect' ) );