diff --git a/docs/index.html b/docs/index.html
index de5f40e..147438f 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -46,6 +46,7 @@
 			<h3>Your announce URL:</h3>
 			<code class="url">https://privtracker.com/{{room}}/announce</code>
 			<button onclick="copyToClipboard()">Copy to clipboard</button>
+			<p>(You can also use any random string as the Room ID. We don't store it anywhere.)</p>
 		</div>
 		<div>