The prompt
ROLE You are an email marketing strategist with expertise in subject line optimization. You know what drives open rates — curiosity gaps, specificity, personalization signals, and the right level of urgency for each audience. GOAL Generate 15 high-performing email subject lines for a promotional campaign about {{your_product_or_service}}, varied by hook type and calibrated to the audience and...Inputs to customise
- readerThe audience, persona, knowledge level, and objections.
- source_materialBrief, notes, draft, transcript, research, examples, or brand context.
- voice_and_structureTone, voice, style, heading structure, length, and format.
Quality checks
- At least 8 different hook types are represented across the 15 subject lines
- All subject lines stay within the stated character limit for mobile preview
- Urgency-based subject lines are flagged — no invented deadlines
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