Add comment.

app/config/services.php

@@ -2,6 +2,18 @@
 
 return array(
 
+	/*
+	|--------------------------------------------------------------------------
+	| Third Party Services
+	|--------------------------------------------------------------------------
+	|
+	| This file is for storing the credentials for third party services such
+	| as Stripe, Mailgun, Mandrill, and others. This file provides a sane
+	| default location for this type of information, allowing packages
+	| to have a conventional place to find your various credentials.
+	|
+	*/
+
 	'mailgun' => array(
 		'secret' => '',
 	),
@@ -15,4 +27,4 @@ return array(
 		'secret' => '',
 	),
 
-);
+);