A/B Testing for Beginners

Replace Opinions With Evidence

A/B testing shows two versions of a page to different visitors and measures which performs better. Instead of debating which headline is stronger, you let real behavior decide.

How a Basic Test Works

1. Pick one thing to change — a headline, button, or image
2. Create version A (current) and version B (the change)
3. Split traffic between them
4. Measure which gets more of the action you care about

Test One Thing at a Time

If you change five elements at once, you won't know which one mattered. Isolate a single variable so the result is clear.

Give It Enough Traffic and Time

Small samples lie. Wait until enough people have seen both versions before trusting the result, and don't stop the moment one pulls ahead.

Start With High-Impact Pages

Test where it counts — your main landing page, checkout, or sign-up form. Small wins on high-traffic pages add up fast.