Popups are displayed randomly. So, you can see three popups with different design and one standard template.
A/B testing (also known as split testing or bucket testing) is a method of comparing two versions of a webpage or app against each other to determine which one performs better. By creating an A and B variant and testing them against each other, you can use data & statistics to validate new design changes and improve your conversion rates.
A/B testing is one of the easiest ways to increase conversion rates and learn more about your audience, but it is still underutilized by many otherwise very switched on, online marketing professionals. This is often because any form of testing is wrongly assumed to be very technical, time consuming and difficult to implement; however this is just not the case.
A/B testing is a simple way to test changes to your page against the current design and determine which ones produce positive results. It is a method to validate that any new design or change to an element on your webpage is improving your conversion rate before you make that change to your WordPress site code.