Well, not exactly banners, I just used this word as it is easier to understand in a title.
So, I have 16 different CTA "boxes" with a couple lines of persuasive copy and a CTA button. I want to test which one performs the best. I am showing the boxes randomly and counting button clicks as events in GA. However, without knowing how many times each CTA "ad" has shown, number of button clicks doesn't say much.