This page exists so you can test the embeddable chat widget in isolation. The bubble in the lower-right is the only thing this page renders — everything else is the visitor's actual website.
Open the agent dashboard in another tab, click the bubble here, and chat with yourself end-to-end.
To embed on a real site, drop these two lines into the page:
<link rel="stylesheet" href="https://chat.csg.com/widget.css">
<script src="https://chat.csg.com/socket.io/socket.io.js"></script>
<script src="https://chat.csg.com/widget.js"></script>