[utm_campaign] – Prints out utm_campaign variable.
[utm_source] – Prints out utm_source variable.
[utm_term] – Prints out utm_term variable.
[utm_medium] – Prints out utm_medium variable.
[utm_content] – Prints out utm_content variable.
[gclid] – Prints out gclid variable.
[handl_original_ref] – The URL from which the user came to your site
[handl_landing_page] – The very first page the user visited on your site.
[handl_ip] – The IP address of the user.
[handl_ref] – The URL which the user came from to the page you have the shortcode.
[handl_url] – The URL on which you placed the shortcode.