diff --git a/index.html b/index.html
index fbe4c52..f191436 100644
--- a/index.html
+++ b/index.html
@@ -24,6 +24,10 @@
                 <a href='./content-editable/index.html'>
                     Content Editable</a> - Make the content Editable
             </li>
+            <li>
+                <a href='./mark/index.html'>
+                    Mark Content</a> - Highlight things
+            </li>
         </ul>
     </div>
 </body>
diff --git a/mark/index.html b/mark/index.html
new file mode 100644
index 0000000..e4b203b
--- /dev/null
+++ b/mark/index.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset='utf-8'>
+    <meta http-equiv='X-UA-Compatible' content='IE=edge'>
+    <title>HTML Tips and Tricks - Details Tag</title>
+    <meta name='viewport' content='width=device-width, initial-scale=1'>
+    <link rel='stylesheet' type='text/css' media='screen' href='../main.css'>
+</head>
+
+<body>
+    <div class="demo">
+        <h1>Mark something to Highlight</h1>
+        <p> Did you know, you can <mark>"Highlight something interesting"</mark> just with a HTML tag? </p>
+    </div>
+</body>
\ No newline at end of file
