A Clickstream is the recording of what a computer user clicks on while web browsing or using a personal computer.
As the user clicks anywhere in the tool, application or the webpage the action is loggedon a client or inside the web server, as well as possibly the web browser, routers, proxy servers, and ad servers.
The number of trackable URLs that have been clicked. This number may be greater than the number of opens or recipients if recipients click on a trackable URL multiple times, or if there are multiple trackable URLs in your message that recipients are clicking on.