Your email subject line determines whether your email gets opened or ignored. Even the best email campaign won't generate sales if nobody opens it.
Why Subject Lines Matter
Subscribers decide in seconds whether to open an email. A strong subject line creates curiosity, communicates value, and builds trust.
"Spend almost as much time writing your subject line as you spend writing the email itself."
10 Proven Subject Line Formulas
- Curiosity: You're Missing One Simple Email Trick…
- Numbers: 7 Email Mistakes Killing Your Sales
- Benefits: Double Your Email Revenue This Month
- Urgency: Ends Tonight: Save 20%
- Questions: Are You Making This Email Mistake?
- Personalization: Sarah, We Picked This for You
- How-to: How to Recover Abandoned Carts
- Social Proof: Why 5,000 Store Owners Use This Strategy
- Newness: Just Launched: Our New Collection
- Exclusivity: VIP Early Access Starts Now
Subject Lines to Avoid
- Newsletter #15
- Hello
- BUY NOW!!!!!!
- Important Update
Best Practices
- Keep it under 50 characters where possible.
- Avoid spam words and excessive punctuation.
- Match the promise in the email body.
- A/B test two subject lines whenever possible.
- Write for humans, not algorithms.
✅ Great subject lines create curiosity, promise value, and accurately reflect the content inside the email.
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