Writing

How to Write a Subject Line for an Email

Spencer LanoueSpencer Lanoue
Writing

Crafting the perfect email subject line can feel like a puzzle sometimes. You want to grab attention without being misleading, and you need to convey the essence of your message in just a few words. In this post, I'll guide you through some practical tips and strategies to make your email subject lines not only effective but also engaging. Let's jump right in and explore some of the best practices for writing subject lines that truly work.

Make It Clear and Concise

Ever received an email with a subject line so vague you couldn't tell what it was about? That's what we're aiming to avoid. Clarity is key when it comes to subject lines. The reader should have a good idea of what the email contains after just a quick glance. This doesn't mean you have to spell out every detail. Just enough to pique interest and provide context.

  • Keep it short: Aim for 6-10 words. This range is generally visible on most devices without being cut off.
  • Avoid jargon: Unless you are certain your audience understands specific industry terms, it's best to keep things simple.
  • Be direct: Use action-oriented language to convey your message clearly.

Here's an example of a clear and concise subject line:

Meeting Rescheduled to 3 PM - Please Confirm

This subject line is straightforward and tells the recipient exactly what to expect from the email.

Use Personalization to Your Advantage

Personalization can make your emails feel more relevant to the recipients. When you include personal elements, like the recipient's name or other specific details, it shows that the email is tailored for them. This can significantly increase open rates.

  • Include names: If possible, include the recipient's name in the subject line to grab their attention.
  • Focus on interests: Tailor the subject line to the recipient's interests or past interactions.
  • Segment your list: Group recipients with similar interests or demographics to create more targeted subject lines.

Here's how a personalized subject line might look:

John, Your Exclusive Offer Awaits!

By addressing the recipient directly, this subject line feels more inviting and personalized.

Creating Urgency and Scarcity

Urgency and scarcity are powerful motivators. When people feel they might miss out on something valuable, they're more likely to take action. However, it's crucial to use this technique ethically. Misleading your audience can lead to trust issues.

  • Use time-sensitive language: Words like "today," "now," or "last chance" can create a sense of urgency.
  • Highlight limited availability: If something is in short supply, let your audience know.
  • Keep it honest: Only use urgency when it's truthful. Misleading your audience can backfire.

Consider this subject line example:

Last Day to Register for the Webinar!

This line communicates urgency and encourages immediate action.

Leverage Curiosity Without Being Vague

Curiosity can be a fantastic tool to engage your audience, but there's a fine line between piquing interest and being too vague. You want to intrigue your reader enough to open the email without leaving them confused about its contents.

  • Ask questions: Posing a question can make readers curious about the answer.
  • Use teasers: Provide just enough information to spark interest.
  • Avoid clickbait: Be truthful about the content inside the email.

Here's how you can use curiosity effectively:

Have You Tried This Morning Routine Yet?

This question invites the reader to discover more about the topic without misleading them about the email's content.

Avoiding Spam Triggers

Nobody wants their email to end up in the spam folder. Certain words and phrases can trigger spam filters, so it's best to avoid them in your subject lines. Here are some tips to help keep your emails out of the spam box:

  • Avoid excessive punctuation: Multiple exclamation points or question marks can raise red flags.
  • Steer clear of all caps: Emails with subject lines in all caps often look spammy.
  • Watch out for common spam phrases: Words like "free" or "buy now" can trigger spam filters.

Instead of using spammy phrases, try something like this:

Discover Your Free E-Book Today

This subject line avoids common spam triggers while still offering value to the reader.

Testing and Analyzing Your Subject Lines

Testing is a key part of refining your email strategy. By experimenting with different subject lines, you can see which ones resonate most with your audience. This is where analytics can be your best friend.

  • A/B testing: Send two different subject lines to small portions of your list to see which performs better.
  • Analyze open rates: Look at your email analytics to see which subject lines are getting the most opens.
  • Iterate and improve: Use your findings to refine your future subject lines.

Remember, what works for one audience might not work for another, so continuous testing is essential.

Spell: Your AI-Powered Email Assistant

While crafting the perfect subject line might seem like a daunting task, Spell can ease the process. Our AI document editor helps you brainstorm and refine email subject lines, offering suggestions that save you time and effort. With Spell, you can focus on what matters most. Connecting with your audience.

Consider using Spell for:

  • Generating creative subject line ideas
  • Editing and refining your drafts
  • Collaborating with your team in real time

With Spell, you can craft engaging subject lines faster than ever.

Stand Out With Humor and Creativity

In a crowded inbox, a touch of humor or creativity can make your subject line stand out. However, it's important to know your audience and ensure that your tone aligns with your brand.

  • Be playful: Use puns or playful language to engage your readers.
  • Stay on brand: Ensure your humor matches your brand's voice.
  • Test your tone: What might be funny to you could be misunderstood by others, so test your creative subject lines.

A creative subject line example could be:

Our New Product is 'Gouda' Than Ever!

This playful pun adds a lighthearted touch while still communicating the essence of the email.

Know Your Audience

Understanding your audience is fundamental when writing subject lines. Different groups respond to different styles, so tailor your approach accordingly. Consider factors like age, interests, and preferences when crafting your subject lines.

  • Segment your list: Divide your audience into groups with similar characteristics.
  • Analyze past interactions: Look at which emails and subject lines have resonated before.
  • Adjust your tone: Match your language style to your audience's preferences.

A subject line that resonates with a younger audience might look like:

Unlock Your VIP Access to the Latest Trends!

This line feels exclusive and trendy, appealing to a fashion-forward demographic.

Final Thoughts

Writing an effective email subject line is both an art and a science. By focusing on clarity, personalization, and creativity, you can craft subject lines that capture attention and drive engagement. And if you're looking for a little extra help, Spell is here to streamline the process, offering AI-powered suggestions to elevate your email game. Happy writing!

Spencer Lanoue

Spencer Lanoue

Spencer has spent 10+ years building products and growing startups like Buffer, UserTesting, and Bump Health. After working remote-first for many years, he realized the importance of writing great docs. And now he’s helping other teams use AI to do the same with Spell.