The supported macros are:
{query} - publisher search keyword
{banner} - ad id
{bid}
{keyword} - matched keyword
{subid} - publisher feed subid
{pubfeed} - publisher feed id
{remfeed} - remote feed id
{ga} - required for Google Analytics statistics
{aa} - required for Event Tracking
{conversion} - conversion tracking
{referrer} - referrer url
(urlencoded)
{referrer_domain} - referrer domain
{country} - two-letter visitor's country
{state} - visitor's state
{city} - visitor's city

You can also find a more extended list on the section of the Creative creation on the campaign itself:

 

Did this answer your question?