Our Apps & Plugins page contains links to plugins for many different platforms. All of them will get the tracking code installed on your site automatically, and many of them have additional features such as goal integration and tracking logged in users (usernames, etc). All plugins will ask for your Clicky site ID, and sometimes your "sitekey" and "admin sitekey". These are available on your site preferences page.

Alternatively, you can install the tracking code manually. The tracking code link below will show you where to get your site's tracking code, and instructions for integrating that code onto your site are on the Apps & Plugins page, under the "Manual integration" section.