Ok so I have decided to A/B test my AdSense ads. I have run a few tests, but I don't know what conclusion to draw and how to keep track of things. Some specific questions:
If I have 2 test units, 1 wins. I test that with a new and so on. How do I find if say the fifth one did better than the first one? How do I keep track of things?
Do I let the variables independent of each other, because they certainly are not. In real life, font size can affect CTR even if the colors are different.
I can test blue color with red color, and then test Arial font with Georgia, but how do I know which combination is the best? This would result in way too many test units.
I tried Googling a lot, but I could not find answers to these questions.