What is A/B testing?
A/B testing, also called split testing, is the practice of comparing two versions of something to see which one performs better. You show Version A to one group of people and Version B to another, then measure which version produces more conversions, clicks, sign-ups, or whatever metric matters to your goal.
The power of A/B testing lies in replacing opinions with data. Instead of debating whether a green or blue button will get more clicks, you test both and let the numbers decide. This removes guesswork from marketing decisions and builds a culture of continuous, evidence-based improvement.
A/B testing applies to virtually every element of your marketing: email subject lines, landing page headlines, ad copy, CTA button text, form fields, images, pricing presentation, and page layouts. Each test produces a small improvement, but those improvements compound over time into significant performance gains.