As a Self-Service Advertiser, you can use the following variables (dynamic tags/tokens) to track interesting data through your URL and your own tracking system:
{zoneid} - ID of the ad zone where the ad is displayed
${SUBID} - Unique ID for tracking conversions
{cost} - allows to track impressions/click cost. Please be aware that the {cost} token can only be used with Onclick campaigns that operate on the SmartCPM/CPM pricing models and banner campaigns that operate on the SmartCPM/CPM/CPC pricing models.
{campaignid} - allows referring data by campaign ID
{os} - allows tracking data by OS
{os_version} - allows tracking data by OS version
{device} - allows tracking data by device
{browser} - allows tracking data by browser
{browser_lang} - allows tracking data by browser language
{connection_type} - allows tracking data by connection type (3G\WIFI)
{carrier} - allows tracking data by ISP (carrier)
{geo} - allows to track data by countries
{state} - allows tracking data by states
{city} - allows tracking data by cities
{cohort} - allows tracking data by user activity
{pn_type} - allows tracking data by push-notification campaigns traffic type (Native Push, In-Page Push or Banner in case you use Cross Format Advertising)
{bannerid} - allows tracking data for each creative