To test if your popups/conversion mats are properly working without impacting the campaign analytics, add this parameter to your URL :
for example if your URL is http://www.site.com, the test URL is
If you have already some parameter in your URL like :
Just add the "ef_test=yes" to you URL, your final URL will be
By using this feature, you'll be able to test your popups/conversion mats without affecting the campaign analytics or adding cookies to mark you as a visitor that took action and opted-in.