WordPress at a glance
function is not described

Automattic\WooCommerce\Admin\Notes

TrackingOptIn::__construct() public WC 1.0

Attach hooks.

{} It's a method of the class: TrackingOptIn{}

No Hooks.

Return

null. Nothing.

Usage

$TrackingOptIn = new TrackingOptIn();
$TrackingOptIn->__construct();

Code of TrackingOptIn::__construct() WC 5.2.2

<?php
public function __construct() {
	add_action( 'woocommerce_note_action_tracking-opt-in', array( $this, 'opt_in_to_tracking' ) );
}