Subject Line Tips to Boost Your Email Open Rates

by | May 13, 2023 | Email Marketing

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The email subject line is one of the most important elements in email marketing. If you are struggling to increase your open email rates, these subject line tips will help.

The subject line is the first thing your subscribers see when they get your email, and it has a significant impact on whether or not they choose to open it. 

Therefore, it’s critical to create subject lines that are appealing to your audience and appealing to read.

In this article, we will share some email subject line tips that will help you improve your open rates and engagement. We’ll cover everything from the basics of subject line writing to more advanced techniques like personalization and A/B testing. 

Why email Subject Lines Matter

We often focus on crafting the perfect email body, but a well-written subject line is just as important. 

In fact, it’s the first impression we make on our recipients, and it can determine whether they open, ignore, or delete our email.

Here are a few reasons why subject lines matter:

They Grab Attention

A catchy subject line can grab our recipient’s attention and entice them to open our email. 

It can be the difference between our email getting lost in a sea of unread messages or standing out in their inbox.

They Set Expectations

Our subject line should accurately reflect the content of our email. 

It sets expectations for our recipients and helps them decide whether our email is worth opening. 

If our subject line is misleading or irrelevant, our recipient may be more likely to ignore or delete our email.

They Convey Urgency

Creating a sense of urgency in our subject line can encourage our recipient to take action. 

For example, using phrases like “Limited Time Offer” or “Last Chance” can create a sense of urgency and encourage our recipient to act quickly.

They Affect Open Rates

Our subject line is one of the most important factors that affects our email open rates. 

It’s important to spend time crafting a subject line that will grab our recipient’s attention and encourage them to open our email.

Subject lines matter because they grab attention, set expectations, convey urgency, and affect open rates. 

We should take the time to craft a subject line that accurately reflects the content of our email and encourages our recipient to open it.

Best email subject line tips

There are a few excellent practices to remember when creating powerful email subject lines. 

Keep it Short and Sweet

Writing concise and direct subject lines is one of the most important aspects to keep in mind. 

Subject lines with fewer than 50 characters tend to have higher open rates than longer ones. 

So aim to keep your subject lines concise and impactful.

Be Specific and Relevant

It’s important to make sure that the subject lines of your emails are precise as well as relevant to the email’s content.

Avoid being vague or misleading, as this can lead to lower open rates and even unsubscribes. 

Instead, use clear and descriptive language that accurately reflects the purpose of your email.

Personalize When Possible

Personalization can be a powerful tool for increasing open rates and engagement. 

Consider using merge tags to include the recipient’s name or location in your subject line, as this can help to create a more personalized experience for the reader. 

Just be sure to use personalization strategically and avoid overusing it.

Create a Sense of Urgency

To get readers to respond to your email, you might want to instill a sense of urgency. 

Create a sense of urgency by using words like “Limited Time Offer” or “Last Chance” to drive readers to take action.

Avoid Spam Trigger Words

One of the most effective email subject line tips is that it’s important to avoid using words or phrases that could trigger spam filters. 

Some common spam trigger words include “free,” “act now,” and “guaranteed.” 

Instead, focus on using clear and descriptive language that accurately reflects the content of your email.

Test and Analyze

In order to determine which of your subject lines resonates most with your audience, it’s important to test and analyze them. 

Consider using A/B testing to compare different subject lines and see which ones have the highest open rates. And, use analytics tools to track your email performance over time and make adjustments as needed.

By following email subject line tips, we can write subject lines that are more likely to be opened and engaged with by our target audience.

Examples of Effective Subject Lines

There are a few important tips to keep in mind while creating excellent subject lines. 

Personalization: Using the recipient’s name or other personal details can make the email feel more relevant and important to them. For example: “John, don’t miss out on this exclusive offer!”

Urgency: Creating a sense of urgency can encourage recipients to take action quickly. For example: “Last chance to save 50% on our best-selling products!”

Curiosity: Piquing the recipient’s curiosity can make them more likely to open the email to find out more. For instance, “You won’t believe what we have in store for you…”

Benefit-focused: Highlighting the benefits of opening the email can make the recipient more interested in reading it. For example: “Discover the secret to more productive mornings with our latest guide!”

Humor: Using humor can help your email stand out in a crowded inbox and make the recipient more likely to open it. For example: “Why did the chicken cross the road?” “To get to our amazing sale!”

Remember, the most effective subject lines are often a combination of these strategies. 

A subject line that is both personalized and benefit-focused can be especially effective. 

Experiment with different approaches to see what works best for your audience.

Common Mistakes to Avoid

When it comes to crafting email subject lines, there are several common mistakes that can hinder your open rates. 


Using all caps in your subject line can come across as shouting and may turn off your readers. 

Instead, strive to make your subject line stand out by using suitable capitalization and punctuation.

Vague Language

Your subject line should not contain words like “Important Information” or “Don’t Miss Out.” 

Instead, be clear about what is in your email and why it is important to your readers.


While personalization can be a powerful tool in email marketing, overdoing it can come across as spammy and turn off your readers. 

Instead, use personalization sparingly and make sure it’s relevant to your readers.

Typos and Grammatical Errors

Typos and grammatical errors in your subject line can make your email look unprofessional and may cause readers to question the quality of your content.

Make sure to proofread your subject line before sending your email.

Lengthy Subject Lines

Long subject lines can be overwhelming and may get cut off on mobile devices. Keep your subject lines short and to the point, ideally under 50 characters.


While clickbait subject lines may get more opens, they can also lead to reader disappointment and unsubscribes.

Instead, focus on delivering valuable content that your readers will appreciate.

By avoiding these common mistakes, you can create subject lines that are more engaging and effective in driving opens and clicks.

Crafting a compelling subject line is crucial to the success of your email marketing campaign. 

It is the first thing that your subscribers will see, and it can determine whether or not they will open your email. Therefore, it is essential to follow some best practices when creating your subject lines.

We recommend keeping your subject lines short and sweet, ideally under 50 characters. This will ensure that they are fully visible on mobile devices, which is where the majority of emails are opened these days. 

Additionally, using emojis in your subject lines can help them stand out in a crowded inbox.

Personalize your subject lines whenever possible. This can be as simple as including the recipient’s first name or referencing their past purchases or interactions with your brand. Personalization can help increase open rates and engagement.

It is important to test and optimize your subject lines over time. A/B testing can help you determine which subject lines are resonating with your audience and which ones are falling flat. 

By continuously refining your subject lines, you can improve the effectiveness of your email marketing campaigns and drive better results.

Overall, subject lines are a critical component of any successful email marketing campaign. 

When you use these email subject line tips, you will draw your readers in, entice them to open your emails, and ultimately increase conversions for your business by following these guidelines and best practices.

Key Takeaways

  1. Subject lines are one of the most important elements in email marketing, as they determine whether or not recipients will open your email.
  2. A well-written subject line should grab attention, set expectations, convey urgency, and accurately reflect the content of the email.
  3. Best practices for writing subject lines include keeping them short and sweet, being specific and relevant, personalizing when possible, creating a sense of urgency, and avoiding spam trigger words.
  4. Effective subject lines often use personalization, urgency, curiosity, benefit-focused language, and even humor.
  5. Common mistakes to avoid when crafting email subject lines include using all caps, being vague or misleading, and overusing personalization or urgency. It’s also essential to test and analyze your subject lines to see what works best for your audience.

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