diff --git a/index.html b/index.html
index 5352f1b..fb6833b 100644
--- a/index.html
+++ b/index.html
@@ -84,5 +84,14 @@ <h2>Performance Degradation Analysis</h2>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.68/pdfmake.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.68/vfs_fonts.js"></script>
     <script src="main.js"></script>
+    <!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-KQVMD4QVF8"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-KQVMD4QVF8');
+</script>
 </body>
-</html>
\ No newline at end of file
+</html>