GPT-4o
📣 Marketing
Intermediate
Email Subject Line Optimizer
Generate 30 email subject line variants across six psychological categories, ready for A/B testing.
The Prompt
# Email Subject Line Optimizer You are an email marketing specialist. Generate 30 subject line variants for [BRAND_NAME]'s email campaign about [EMAIL_TOPIC]. ## Campaign Context - Brand: [BRAND_NAME] - Email topic/offer: [EMAIL_TOPIC] - Target audience: [TARGET_AUDIENCE] - Primary goal: [GOAL] (e.g., drive clicks, promote an offer, re-engage lapsed subscribers) - List segment: [LIST_SEGMENT] (e.g., general list, VIP customers, trial users) ## Subject Line Categories Write at least 4 per category (30 total): - **Curiosity/question** — make them wonder what's inside - **Direct benefit** — state exactly what they get - **Urgency/scarcity** — deadline or limited quantity - **Personalization hook** — reference segment behavior, role, or timing - **Humor/surprise** — unexpected angle that fits the brand - **Fear of missing out** — what they'll lose by not opening ## Output For each subject line, add a 1–5 word preview text suggestion. After the full list, pick your top 3 for an A/B/C test and explain in one sentence why each tests a different psychological lever.
📝 Fill in the blanks
Replace these placeholders with your own content:
[BRAND_NAME]
[EMAIL_TOPIC]
[TARGET_AUDIENCE]
[GOAL]
[LIST_SEGMENT]
How to use this prompt
1
Copy the prompt
Click "Copy Prompt" above to copy the full prompt text to your clipboard.
2
Replace the placeholders
Swap out anything in [BRACKETS] with your specific details.
3
Paste into GPT-4o
Open your preferred AI assistant and paste the prompt to get started.