metatag-8.x-1.x-dev/metatag_dc_advanced/metatag_dc_advanced.module

<?php

/**
 * @file
 * Contains metatag_dc_advanced.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Implements hook_help().
 */
function metatag_dc_advanced_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the metatag_dc_advanced module.
    case 'help.page.metatag_dc_advanced':
      $output = '';
      $output .= '<h3>' . (string) new TranslatableMarkup('About') . '</h3>';
      $output .= '<p>' . (string) new TranslatableMarkup('Provides forty additional meta tags from the <a href="https://dublincore.org/">Dublin Core Metadata Institute</a>.') . '</p>';
      return $output;

    default:
  }
}