ClickTag, what is it?
ClickTags are used in the advertising world in order to assign a destination on a Flash banner dynamically. The banner will retrieve the value of the ClickTag parameter and use it as a click target.
If you need to generate ClickTags compatible banners, use to the Project/Settings... menu and then go to "Global Click Action" tab. Then select "ClickTag": this will work with most banner ad networks (Google Adwords, 24/7 Real Media, ...)