RetentionWorks with ChatGPT, Claude, Gemini
Email subject lines with a test plan
Generate subject line and preview text options and a simple A/B test plan.
What you need
- Email purpose and content
- Audience segment
- Past best-performing subject lines
The prompt
Write subject lines for [BRAND]'s [CAMPAIGN/FLOW EMAIL] to [SEGMENT]. Content: [SUMMARY]. Past winners: [LIST WITH OPEN/CLICK RATES]. Give 12 options across styles (curiosity, benefit, urgency, personal, playful, plain), each max 45 characters, with matching preview text (max 90). Avoid spam triggers and ALL CAPS. Mark your top 3 and propose an A/B test: which two to test, split, sample size guidance and the metric (clicks or placed order rate, not opens).
Replace everything in [BRACKETS]. Use a business or team account with training on your data switched off, and remove customer personal data before pasting.
What you get
12 subject line and preview text pairs, a top-3 shortlist and a test plan.
The fortnightly brief
Get the brief
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