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A successful email starts with a subject line that grabs the attention of your recipients. Good subject lines are often personal or descriptive, and give people a reason to check out your content. Whatever your approach, it's important to keep your audience in mind, and test different words and phrases to see what they prefer.
In this article, you'll find tips for writing strong subject lines, and learn ways to test subject line performance.
Our Research team analyzes emails sent by users through Mailchimp to find what practices result in the best open rates. Some types of subject lines have proven to be more successful than others.
Here are a few strategies for you to try out.
Use merge tags to personalize your subject lines with each recipient's name or location. Personalization is shown to increase open rates for most users, and may work well when combined with targeted automations such as birthday deals and post-purchase follow-ups.
Getting Started With Merge Tags
Merge Tags for Personalization
Sometimes, it's better to be direct and descriptive than trendy. Seasonal slogans such as "Fall into savings" or "Sizzling summer bargains" are popular but don't offer a specific hook. Instead, try to communicate the benefits of your promotions, or call attention to specific deals.
For many recipients, especially those reading your emails on mobile devices, shorter is often better. We recommend you use no more than 9 words and 60 characters.
Our research shows that it’s best to use no more than 3 punctuation marks per subject line. Too many punctuation marks can make your email look like spam, especially if you use a lot of special characters.
Our built-in emoji picker is a fun and easy way to add some visual pizazz to your subject lines. However, there are a few things to keep in mind when you use emojis.
There are a few ways to learn whether your subject line is a likely winner: Check out the tips in our built-in subject line helper, view your recent subject line performance, or use an A/B test or Multivariate test to see if different subject lines affect your open rates.
Our subject line helper checks to see whether your subject line follows our tips around best practices, which are based on the open rate performance of hundreds of millions of emails in Mailchimp.
We’ll display a green check mark for each tip you follow. If your subject line conflicts with one of our tips, we’ll show an alert and suggest what you should change.
For additional help, click the recent subject lines link to view a list of your last 5 subject lines along with their open rates.
A/B and Multivariate tests reveal how small differences impact performance. Unlike the subject line helper, which uses data from emails sent by all Mailchimp users, A/B and Multivariate tests can tell you what your specific contacts like best.
Create multiple versions of your email that are identical in every way but the subject line, and we'll send them to randomly selected parts of your subscribed audience. We'll automatically send the email with the best open rate to the remainder of your subscribed audience, and you'll learn a little about what kind of subject line appeals to your contacts.
A/B testing is included with all paid marketing plans, and Multivariate testing is included with the Standard plan or higher. To change your plan type, visit the plan page in your account.
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