The Iteratist Blog

A/B testing strategy, CRO tips, and AI-powered marketing insights — written for marketers who want results.

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AI & Automation
How AI Is Changing Conversion Rate Optimisation

Claude and GPT-4 can now generate A/B test hypotheses, write copy variants, and interpret results. Here's what that means for CRO teams in 2026.

June 18, 2026 · 6 min read
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A/B Testing
The Complete Guide to Multi-Variant Testing

Multivariate vs. multi-variant — they sound the same but require very different sample sizes and analysis approaches. We break it all down.

June 15, 2026 · 10 min read
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Google Ads
Google Ads Personalisation: Match Ad Copy to Landing Pages

Message match between your ads and landing page is the single highest-ROI CRO lever you're probably not pulling. A step-by-step implementation guide.

June 11, 2026 · 7 min read
CRO Strategy
Why Most A/B Tests Fail (and How to Fix It)

Running underpowered tests on low-traffic pages is the #1 mistake marketers make. Learn how to calculate sample sizes, set runtimes, and avoid false positives.

June 7, 2026 · 9 min read
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A/B Testing
Visual Editor vs. Code-Based A/B Testing: Which Should You Use?

Visual editors are fast and marketer-friendly. Code-based tools are more precise. We compare the tradeoffs so you can pick the right approach for your team.

June 3, 2026 · 5 min read
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Case Studies
How We Lifted Trial Sign-Ups 28% With One Headline Test

A behind-the-scenes look at a real experiment — from hypothesis to winning variant — and the surprising insight that came from the losing variants too.

May 28, 2026 · 6 min read
CRO Strategy
The 10-Minute CRO Audit Any Marketer Can Do Today

Before you run a single test, you need to know what to test. This quick audit framework identifies your highest-impact opportunities without needing analytics expertise.

May 22, 2026 · 5 min read
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A/B Testing
When to Stop an A/B Test: A Practical Decision Framework

Statistical significance is necessary but not sufficient. Here's the full decision framework we use to decide when to call a winner and move on.

May 16, 2026 · 7 min read
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AI & Automation
5 Prompts to Generate A/B Test Hypotheses with AI

The best experiments start with a strong hypothesis. We've tested dozens of prompting strategies — these five reliably produce actionable, testable ideas.

May 10, 2026 · 4 min read
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