diff --git a/index.html b/index.html
index 6eff6c7..1dff21f 100644
--- a/index.html
+++ b/index.html
@@ -3,9 +3,22 @@
   <head>
     <meta charset="utf-8">
     <title>Marco</title>
-    <meta name="description" content="">
+    <meta name="description" content="Unhosted maps app that respects your privacy and choices.">
     <meta name="viewport" content="width=device-width, initial-scale=1">
 
+    <!-- Open Graph -->
+    <meta property="og:title" content="Marco">
+    <meta property="og:description" content="Unhosted maps app that respects your privacy and choices.">
+    <meta property="og:type" content="website">
+    <meta property="og:url" content="https://marco.kosmos.org">
+    <meta property="og:image" content="https://marco.kosmos.org/icons/icon-512.png">
+
+    <!-- Twitter Card -->
+    <meta name="twitter:card" content="summary">
+    <meta name="twitter:title" content="Marco">
+    <meta name="twitter:description" content="Unhosted maps app that respects your privacy and choices.">
+    <meta name="twitter:image" content="https://marco.kosmos.org/icons/icon-512.png">
+
     <!-- App identity -->
     <meta name="application-name" content="Marco">
     <meta name="apple-mobile-web-app-title" content="Marco">
