What is A/B testing? Split testing explained

A/B testing compares two versions of a page, ad, or email by showing each to a random share of visitors and measuring which performs better.

Example

Half of visitors see the product page with reviews above the fold and half see the original; add-to-cart rate decides the winner.

Why does A/B testing matter for e-commerce?

Change one variable per test and fix the sample size in advance — otherwise you can't tell what caused the result.

How does Posta use A/B testing?

Posta's agents use A/B testing when reviewing your accounts and recommending changes. See the conversion rate optimization page for how it fits into your workflow.