Zephyr allows kicking off or launching of automation scripts on remote target machines. For this to happen, testcases must have been marked as Automated and details about the automation script must have been added to that testcase in the Test Repository process. It is also required to have a remote agent - ZBot - installed on the target machine in order to launch the automated script on that remote machine.
Automation testcases can be executed by clicking on the "E" button that shows up for a testcase that has been marked Automated. A single test script can be executed or a batch of them can executed at one time.