You might remember, we create buttons with the button tags, <button> and </button>.

Add the <button> and </button> tags around Publish website.

<html>
<body>
  <button>Publish website</button>
  <p id="prompt"></p>
<script>
function sayHello() {
  document.getElementById("prompt").innerHTML = "Hello!";
}
</script>
</body>
</html>]]>

Make sure to add <button>Publish website</button>.