diff --git a/index.html b/index.html
index 472da06..daddd8d 100644
--- a/index.html
+++ b/index.html
@@ -25,6 +25,12 @@
 
     <!-- meta image  -->
     <meta property="og:image" content="./assets/images/favicon.png" />
+    <meta name="robots" content="index, follow" />
+    <meta name="revisit-after" content="3 days" />
+    <meta name="language" content="English" />
+
+    <!-- meta title  -->
+    <meta property="og:title" content="Simple Calculator" />
 
     <script src="https://cdn.tailwindcss.com"></script>