WordPress at a glance
function is not described

get_site_screen_help_sidebar_content() WP 4.9.0

Returns the content for the help sidebar on the Edit Site screens.

No Hooks.

Return

String. Help sidebar content.

Usage

get_site_screen_help_sidebar_content();

Code of get site screen help sidebar content: wp-admin/includes/ms.php VER 5.1.1

<?php
function get_site_screen_help_sidebar_content() {
	return '<p><strong>' . __( 'For more information:' ) . '</strong></p>' .
		'<p>' . __( '<a href="https://codex.wordpress.org/Network_Admin_Sites_Screen">Documentation on Site Management</a>' ) . '</p>' .
		'<p>' . __( '<a href="https://wordpress.org/support/forum/multisite/">Support Forums</a>' ) . '</p>';
}