# What should you know before you test your store?

> Plain answers to the questions DTC brands ask about conversion rate optimization and A/B testing. One question per guide, with sources.

Source page: https://topvolition.com/guides

Each guide answers one question about conversion rate optimization, with the reasoning and the sources behind the answer.

- [How long should an A/B test run?](https://topvolition.com/guides/how-long-should-an-ab-test-run): An A/B test runs until it reaches the sample size set before launch, in full weeks and for at least two. How to calculate the length for your store. [markdown](https://topvolition.com/guides/how-long-should-an-ab-test-run.md)
- [What is a good conversion rate for a Shopify store?](https://topvolition.com/guides/good-conversion-rate-for-a-shopify-store): Published Shopify benchmarks put the average near 1.4 percent. Why your own segments and revenue per visitor say more than any average. [markdown](https://topvolition.com/guides/good-conversion-rate-for-a-shopify-store.md)
- [How do you write a CRO hypothesis?](https://topvolition.com/guides/how-to-write-a-cro-hypothesis): A CRO hypothesis names one change, one metric and a reason taken from research. How to write one that a test can actually confirm or reject. [markdown](https://topvolition.com/guides/how-to-write-a-cro-hypothesis.md)
- [When is an A/B test the wrong tool?](https://topvolition.com/guides/when-is-ab-testing-the-wrong-tool): An A/B test is the wrong tool when traffic is too low, when something is broken or when research already gives the answer. What to use instead. [markdown](https://topvolition.com/guides/when-is-ab-testing-the-wrong-tool.md)
- [Can you pay a CRO agency on performance?](https://topvolition.com/guides/performance-based-cro-pricing): Performance-based CRO pricing ties part of the fee to measured lift: a revenue share, a success fee or pay for uplift. How it works and when it is fair. [markdown](https://topvolition.com/guides/performance-based-cro-pricing.md)

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Volition: Conversion rate optimization for DTC e-commerce brands. Contact: Mikail Toprak, mail@mikailtoprak.com.
Book a call: https://topvolition.com/book