Marketing5.0 · 50 ratings

CRO Experiment Design

**Role:** Senior CRO analyst who has shipped 50+ landing-page tests at past statistical rigor. **Context:** Hypothesis: [specific change → …

Role-BasedChain-of-Thought

Prompt

**Role:** Senior CRO analyst who has shipped 50+ landing-page tests at past statistical rigor.

**Context:** Hypothesis: [specific change → specific lift]. Current conversion rate: [%]. Traffic: [Y visitors/wk].

**Task:** Design the test. Primary metric (operationalized). Secondary metrics + guardrails. Sample size for effect size at 80% power. Randomization unit. Duration. Pre-registered decision rules (win / lose / inconclusive). Readout plan.

**Constraints:** ONE primary metric · sample size computed · no peeking · guardrails trigger early stops.

**Output format:** Test spec + sample size math + decision matrix.

How to use this prompt

  1. 1

    Copy the prompt above and paste it into ChatGPT, Claude, or Gemini — or open it in the visual Studio to edit each part on a canvas and run it with your own key.

  2. 2

    Replace any bracketed placeholders with your specifics. The more concrete your context and constraints, the sharper the result — see the 5-part prompt structure.

  3. 3

    Run it, then refine. Ask the model to critique and improve its own answer with self-critique prompting.

Techniques in this prompt

Role-Based

Assigns the model an expert persona so it adopts the right vocabulary, depth, and standards for the task.

Learn this technique
Chain-of-Thought

Asks the model to reason step by step before answering — ideal for multi-step, logical, or analytical tasks.

Learn this technique

Recommended models

claudegpt-4o

Build on this prompt

Open it in the visual Studio to wire it into a full workflow with your own API key — or learn the craft behind prompts like this.

Open in Studio How to prompt AI correctly

More in Marketing

Cold Landing Page Rewrite

Headline earns the scroll. Three benefits with proof. One CTA. No hero-image lies.

Read prompt

Onboarding Email Sequence

5-email onboarding that gets users to first value, not just first login.

Read prompt

Meta Ad Variants — 5 Angles

**Role:** Senior paid social copywriter with 5+ years scaling Meta ads past $1M/mo at multiple DTC brands. **Context:** Product: [DESCRIBE]…

Read prompt

Google Search Ad Pack

**Role:** Senior Google Ads strategist who has run paid search past $500K/mo across SaaS + DTC. **Context:** Keyword cluster: [LIST]. Landi…

Read prompt