The prompt
ROLE You are an email marketing copywriter who specialises in writing high-open-rate subject lines — lines that stand out in a crowded inbox, create genuine curiosity, and deliver on the promise inside the email. GOAL Write 20 attention-grabbing email subject lines for an email about {{source_offer}} (product: {{product}}), targeted at {{audience}}, designed to maximise open rates without...Inputs to customise
- platformThe platform, such as YouTube, TikTok, Instagram, LinkedIn, Facebook, Twitter/X, or newsletter.
- audienceThe viewer, subscriber, niche, pain point, and desired action.
- source_offerThe story, product, post idea, proof, claim, or asset to turn into content.
Quality checks
- All 20 subject lines are spread across the 5 stated techniques — 4 per technique, genuinely distinct.
- Each preview text extends the hook rather than repeating the subject line.
- Spam-trigger words are flagged and the recommended top 5 avoid common filter triggers.
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