A/B Testing Email Subject Lines the Right Way
How to A/B test email subject lines: what to vary, real sample sizes, and why open rate is the right metric for this specific test.
Complete, honest guides on CRO, A/B testing and experimentation. The most complete articles on the web, no fluff. (page 11 of 17)
How to A/B test email subject lines: what to vary, real sample sizes, and why open rate is the right metric for this specific test.
How to A/B test cart abandonment emails: what to vary, why purchase is the only honest metric, and how to size the test at a 1 to 2 percent base rate.
Discount testing done right: what to vary, why revenue per visitor beats conversion, and how to size a test that will not quietly erode margin.
How to A/B test email send time honestly: why open timestamps lie, what a send time test confounds, and the sample size it really needs.
Freemium paywall testing: where to place the trigger, which metric actually decides the test, and how to size a test when free-to-paid is low.
A/b test pricing the right way: why revenue per visitor beats conversion, how to design a clean test, and the legal traps to avoid.
A price anchoring test measures whether a higher reference price shifts revenue per visitor, not just which tier gets clicked. Full guide.
How to A/B test push notifications: why opt-in changes who enters the test, the sample a low CTR demands, and the guardrail that stops a false win.
How to A/B test subscription vs one-time pricing: why first-purchase conversion misleads, and how to compare revenue fairly over time.