Drupal 8 - Create a Link inside Drupal message

link-message.php

<?php

use Drupal\Core\Url;
use Drupal\Core\Link;

// Create a Url object.
$url = Url::fromRoute('node.add_page');
// Create a Link object.
$link = Link::fromTextAndUrl(t('Add more content'), $url);
// Show the message with Link.
\Drupal::messenger()->addMessage(t('Configuration Saved. @add', [
  '@add' => $link->toString(),
]));

// Thanks 🙂