diff --git a/src/Form/DomainRegistrationAdminForm.php b/src/Form/DomainRegistrationAdminForm.php
index df91f08..07895eb 100644
--- a/src/Form/DomainRegistrationAdminForm.php
+++ b/src/Form/DomainRegistrationAdminForm.php
@@ -66,7 +66,7 @@ class DomainRegistrationAdminForm extends ConfigFormBase {
       '#type' => 'textarea',
       '#title' => $this->t('Email domains'),
       '#default_value' => $config->get('pattern'),
-      '#description' => $this->t('Enter the domains you wish to restrict registration. One entry per line in the format (e.g. something.com). Wildcards are also supported (e.g. *.something.com) to match any subdomain.'),
+      '#description' => $this->t('<p>Enter the domains you wish to restrict registration. One entry per line in the format (e.g. something.com). Wildcards are also supported (e.g. *.something.com) to match any subdomain. Example is:<br />example.com<br />*.example.com<br />xyz<br />*.xyz</p>'),
     ];
     $form['message'] = [
       '#type' => 'textfield',