
How to Write Email Subject Lines That Actually Get Clicked
In a crowded inbox, your subject line is the gatekeeper to your email content. No matter how brilliant your offer, design, or call to action is, if your subject line fails to grab attention, the rest of your email won’t even get a glance.
As brands battle for attention, crafting compelling email subject lines is no longer just a good practice—it’s a necessity. Here’s how you can write subject lines that not only get noticed but also drive real action.
Why Subject Lines Matter So Much
Your subject line is the first impression, the hook, and often the deciding factor for whether someone will open your email. With open rates directly tied to subject line performance, marketers must view them as a critical part of their email strategy.
According to Campaign Monitor, 47% of recipients open an email based solely on the subject line, while 69% report emails as spam based on it. That’s a lot of power for one line of text.
Proven Strategies to Write Click-Worthy Subject Lines
1. Keep It Short and Clear
Most email clients cut off subject lines after 40–60 characters. Keep it concise and make every word count. Aim for 6–10 words or fewer to ensure it’s fully visible across devices.
✅ Example: “50% Off Today Only – Don’t Miss Out!”
2. Create Urgency or Scarcity
People respond to time-sensitive deals. Words like “limited,” “today,” and “ending soon” can motivate recipients to take action now.
✅ Example: “Only 2 Hours Left to Claim Your Gift 🎁”
3. Personalization Wins
Using the recipient’s name or tailoring based on past behavior (like abandoned carts or past purchases) can significantly boost engagement.
✅ Example: “Hey Sarah, Your Favorite Sneakers Are Back in Stock!”
4. Ask a Compelling Question
Questions pique curiosity and invite clicks. Make sure the answer lies within your email.
✅ Example: “Are You Making These Marketing Mistakes?”
5. Use Numbers and Lists
Emails that include numbers are easier to process and more enticing.
✅ Example: “5 Easy Ways to Grow Your Audience This Month”
Bonus Tips
- A/B Test Your Subject Lines: Don’t guess. Test two variations and see which performs better.
- Avoid Spam Triggers: Excessive use of caps, exclamation marks, or words like “Free!!!” can send your email to the spam folder.
- Use Emojis Strategically: Emojis can boost visibility but should align with your brand voice.
5 Common Subject Line Mistakes to Avoid
- Being Too Vague
“Exciting News Inside!” sounds spammy and unclear. - Overpromising and Under-delivering
Make sure your subject line matches the email content. - Using Clickbait Tactics
You may get clicks, but you’ll lose trust quickly. - Not Optimizing for Mobile
Preview your subject lines on mobile devices to ensure they’re not cut off. - Sending Without Testing
Always A/B test when possible. Data will reveal what truly works for your audience.
FAQs
1. How long should an email subject line be?
Ideally, keep it under 50 characters to ensure visibility across devices.
2. Can I use emojis in subject lines?
Yes, but use them sparingly and only if they align with your brand voice and audience preferences.
3. What are some examples of high-performing subject lines?
“Your Free eBook is Here!” or “Don’t Miss This: Exclusive 24-Hour Deal” are effective due to clarity and urgency.
4. Should I personalize every subject line?
Where possible, yes. Personalized emails have higher open and click-through rates.
5. How do I A/B test a subject line?
Split your audience into two groups. Send each a different subject line, and compare open and click-through rates.
Final Thoughts
Subject lines may be short, but their impact is massive. Mastering the art of writing effective email subject lines will dramatically improve your open rates, engagement, and ultimately, conversions.
Invest the time to test, tweak, and refine. Because in email marketing, your subject line isn’t just the beginning—it’s everything.
Ideally, keep it under 50 characters to ensure visibility across devices.
Yes, but use them sparingly and only if they align with your brand voice and audience preferences.
“Your Free eBook is Here!” or “Don’t Miss This: Exclusive 24-Hour Deal” are effective due to clarity and urgency.
Where possible, yes. Personalized emails have higher open and click-through rates.
Split your audience into two groups. Send each a different subject line, and compare open and click-through rates.


