diff --git a/migrate_upgrade.module b/migrate_upgrade.module
index b3d9bbc..490f027 100644
--- a/migrate_upgrade.module
+++ b/migrate_upgrade.module
@@ -1 +1,20 @@
 <?php
+
+/**
+ * @file
+ * Alert administrators before start import process.
+ */
+
+use Symfony\Component\HttpFoundation\Request;
+/**
+ * Implements hook_help().
+ */
+function migrate_upgrade_help($route_name, Request $request) {
+
+  switch ($route_name) {
+    case 'migrate_upgrade.upgrade':
+      $output = '';
+      $output .= '<p>' . t('This form is used for importing configuration/content from a Drupal 6/7 site. Before submit this form, give access to source database and files. Backup the D8 site. For more details, see <a href="@migrate">Upgrading from previous versions</a>.', array('@migrate' => 'https://www.drupal.org/upgrade'));
+      return $output;
+  }
+}