What is AB Testing!

AB Testing is based on a simple principle that we're all familiar with:

- Compare and contrast alternatives;
- Based upon measurement, act accordingly.

Let's say we want to determine whether Nolan Ryan is a better baseball player than Homer Simpson? How should we proceed? First, we might set a metric for what we mean by a "better" baseball player. We can measure evidence in concrete ways, noting the two subjects' different batting averages or RBIs or the like. What we're searching for is the right metric—a formula that would lead us to a correct decision. Such a formula is more precisely termed a "fitness function."

Application of AB Testing