When you export your design for an ad server, a clickTag will be included automatically, along with any other code necessary to display the design. There is no need for additional programming after export.

The clickTag allows the ad server the design is uploaded to to define the click-through URL destination. You can add the destination URL by adding a click-through URL to your design, either in Flexitive or on the ad server you’re uploading the design to. 

Learn how to add a click-through URL to your design: Click-Through URLs.