diff --git a/13-stripe-submenus/setup/src/index.js b/13-stripe-submenus/setup/src/index.js
index ac166dbd0..42ae5bffb 100644
--- a/13-stripe-submenus/setup/src/index.js
+++ b/13-stripe-submenus/setup/src/index.js
@@ -1,10 +1,21 @@
-import React from 'react';
+// Import the React library to use its functionalities for building UI components
+import React from 'react'; 
+
+// Import the ReactDOM library for rendering React elements into the DOM
 import ReactDOM from 'react-dom/client';
-import './index.css';
-import App from './App';
+
+// Import the global CSS file for styling the application
+import './index.css'; 
+
+// Import the main App component, which serves as the root component for the application
+import App from './App'; 
+
+// Create a root object to target the HTML element with the id 'root' for rendering
 const root = ReactDOM.createRoot(document.getElementById('root'));
+
+// Render the App component within the root element inside React's StrictMode
 root.render(
   <React.StrictMode>
-    <App />
+    <App /> {/* The main application component */}
   </React.StrictMode>
 );