Pair a curiosity-focused preheader with a clear action-focused CTA if you want more clicks. That combo teases the value, then tells people exactly what to do. Average email click rates often sit near 2.62% across industries, so even a tiny bump can matter a lot [source: Mailchimp].
TLDR: Use the preheader to create interest, then use the CTA to remove doubt. For example, a pet store tested “Your dog called. He wants this.” as the preheader and “Shop the snack deal” as the CTA. Click-through rate rose from 2.1% to 3.0%, a 43% lift. Cute? Yes. Clear? Also yes.
Why the preheader matters so much
The preheader is that little line of text next to, or under, your subject line. It is inbox real estate. Tiny. Easy to ignore. Easy to waste.
Honestly, it feels silly to lose clicks because the inbox preview says “View this email in your browser.” Yet it happens all the time. That line could have sold the click. Instead, it took a nap.
Think of the subject line as the knock on the door. The preheader is the whisper after it. It adds context. It adds drama. It makes the reader think, “Fine, I’ll open it.”
Then the CTA does the heavy lifting. It turns attention into action.
Curiosity-driven copy: the “wait, what?” effect
Curiosity-driven copy opens a loop. It hints at something. It does not explain everything.
Examples:
- “Most shoppers miss this tiny discount.”
- “Your cart has a secret.”
- “This mistake costs teams 4 hours a week.”
- “The feature nobody noticed is now free.”
This style works because humans hate loose ends. We want the answer. We want the missing piece. We want to know if the “secret” is actually useful, or just another marketing raccoon wearing sunglasses.
Use curiosity in the preheader when the subject line already gives a clear topic.
For example:
- Subject: New summer styles just dropped
- Preheader: The best one is selling weirdly fast.
That preheader adds a little spark. It does not confuse people. It makes them wonder which item is hot.
Action-oriented copy: the “do this now” effect
Action-oriented copy is direct. No fog. No riddles. No treasure map.
Examples:
- “Get 20% off today.”
- “Book your free demo.”
- “Download the checklist.”
- “Start your trial.”
This style works well for CTAs because buttons need clarity. A button is not the place to be too clever. If users pause and think, you may lose them.
Bad CTA:
- “Explore the possibility.”
Better CTA:
- “See pricing.”
- “Claim my 15% off.”
- “Reserve my seat.”
The reader should know what happens after the click. If they fear a long form, a sales call, or another login screen, they may bail. People scan online text fast, and clear labels help them act sooner [source: Nielsen Norman Group].
The best combo for click-through rates
Here is the simple rule:
- Preheader: create curiosity.
- CTA: give a clear action.
This pairing works because it matches the reader’s journey. The inbox needs intrigue. The landing moment needs confidence.
Try this pattern:
- Subject: Your weekly report is ready
- Preheader: One metric jumped 38% overnight.
- CTA: View my report
Or this:
- Subject: The sale ends tonight
- Preheader: The most clicked item is still in stock.
- CTA: Shop the sale
See the rhythm? Tease first. Direct second.
When curiosity wins
Curiosity often wins when your reader already knows your brand. They trust you. They are willing to play along.
It works well for:
- Newsletters
- Product launches
- Content emails
- Customer stories
- Seasonal promos
For example, a software newsletter could use:
- Preheader: The tiny setting that saves 12 clicks a day.
- CTA: See the tip
That is simple. It gives a reason. It still leaves a gap.
Just do not make curiosity feel like bait. If the email says “This changes everything,” the content better not be a beige PDF from 2019. People remember that nonsense.
When action wins
Action-oriented preheaders win when urgency or clarity matters more than charm.
Use action-first copy for:
- Password resets
- Appointment reminders
- Limited-time offers
- Event registration
- Abandoned cart emails
Example:
- Subject: Your cart expires soon
- Preheader: Checkout in 2 minutes and keep your items.
- CTA: Complete checkout
No mystery needed. The user knows the job. Help them finish it.
Curiosity CTAs can work, but be careful
A curiosity-driven CTA can be fun. It can also be vague.
Examples:
- “Show me the secret.”
- “Reveal the winner.”
- “Find my match.”
These can work for quizzes, gift guides, and playful campaigns. They feel personal. They feel light.
But for sales pages, demos, or checkout flows, use direct buttons. Nobody wants to guess what a button does when money is involved.
Easy testing plan
You do not need a huge lab. You need a clean test.
- Pick one campaign. Do not test everything at once.
- Write two preheaders. One curious. One direct.
- Keep the CTA the same. This keeps the test fair.
- Send to equal groups. Split your list evenly.
- Track clicks, not just opens. Opens can be messy.
Example test:
- A: “The guide is ready. Download it now.”
- B: “Most teams skip step 3. Big mistake.”
- CTA: “Download the guide”
If version B gets more opens but fewer clicks, the promise may be too broad. If it gets more clicks, keep that flavor. Then test a new CTA.
Quick copy formulas you can steal
Use these when your brain feels like cold oatmeal.
- Curiosity preheader: “The one thing people miss before they buy.”
- Action CTA: “Shop best sellers”
- Curiosity preheader: “Your report has one strange spike.”
- Action CTA: “Open my report”
- Curiosity preheader: “This free template saves the boring part.”
- Action CTA: “Get the template”
- Action preheader: “Register by Friday to save your seat.”
- Action CTA: “Reserve my spot”
Common mistakes to avoid
- Do not repeat the subject line. Use the preheader to add value.
- Do not hide the offer. Mystery is not confusion.
- Do not use weak CTAs. “Click here” is tired.
- Do not overpromise. The email must pay off the tease.
- Do not test tiny changes forever. Expect to waste time if you test “Get it” versus “Grab it” for a month.
The winning formula is simple: use curiosity to earn attention, then use action to earn the click. Let the preheader flirt a little. Let the CTA be the responsible adult. That balance makes emails feel fun, useful, and easy to act on.