Get their attention: Referral subject line optimization

Subject lines are the gateways to success when it comes to referral programs. A catchy subject line can make all the difference when it comes to getting your customers to open your referral emails, and ultimately, driving more successful referrals. In this blog post, we will discuss just how important a catchy email subject line is for referral program success, as well as some tips and tricks for writing a subject line that will convert.

The Importance of a Catchy Email Subject Line

First and foremost, a catchy email subject line is crucial because it’s the first thing that your customer sees when they receive your referral email. If the subject line is boring or unclear, your customer may simply delete your email without even reading it. On the other hand, if your subject line is engaging and compelling, your customer will be curious to learn more and may even be inspired to share your referral program with their network.

Moreover, a catchy email subject line is also essential for driving open rates. An email subject line that stands out in a crowded inbox can make the difference between a successful referral program and a mediocre one. With an average of 306.4 billion emails sent daily, it’s crucial to make sure your email stands out with a subject line that captures the attention of your customer.

Tips for Writing a Catchy Email Subject Line

1. Keep it short and sweet. According to a study by Litmus Software, subject lines that are under 50 characters have a higher open rate. So, keep your subject line concise and to the point.

2. Use power words. Power words are words that evoke an emotional response from your customer. Words like “free,” “exclusive,” and “limited” can incite interest and curiosity in your customer, pushing them to open your email.

3. Personalize your subject line. Address your customer by name in the subject line to create a sense of familiarity and connection that encourages them to open your email.

4. Use numbers. Using numbers in your subject line can help it stand out in a crowded inbox. Whether it’s a specific percentage off or the number of successful referrals they can make, numbers can make your subject line more tangible and enticing.

5. Use humor. A little bit of humor can go a long way in capturing your customer’s attention. If it fits with your brand voice, consider a funny or quirky subject line that will surprise and delight your customer.

Resources for Creating a Catchy Email Subject Line

If you’re struggling to come up with a catchy email subject line, don’t worry – there are plenty of resources available to help you. Here are a few articles that offer subject line inspiration and advice:

1. 11 Email Blast Examples That Will Get More Customer Referrals (Friendbuy Blog)

2. 41+ Best Referral Email Subject Lines [2023] (Starter Story)

3. How to Write the Best Referral Email [35 Inspiring Examples] (Referral Rock)

4. Increase Referral Email Open Rates: Better Subject Lines + Targeted Messaging (Cloudsponge)

5. 19 of the Best Email Subject Lines Sales Reps Swear By (Hubspot)

By using these resources for inspiration and following the tips outlined in this post, you’ll be able to create a catchy email subject line that drives successful referrals.


In conclusion, a catchy email subject line is essential for referral program success. It’s important to keep your subject line short and sweet, use power words, personalize your subject line, use numbers, and use humor where possible. With a little bit of creativity and inspiration from the resources mentioned above, you can craft a subject line that will drive more customers to sign up for your referral program and increase your overall business success.

So, what are you waiting for? Get creative, and start crafting your successful referral email subject lines today!

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