Email subject lines are the gatekeepers of your email campaigns. When you’ve put hours of effort into getting your segmentation just right and even more hours into nailing your awesome email copy, there is no doubt you want to make sure your emails actually get read!
Subject lines are the first thing your recipients see in their inboxes. The subject line is given pride of place and many argue that you should spend almost twice as much time reviewing your subject line compared with reviewing the body of your email. That’s a big call…but nailing your subject line really does pays off.
This post, inspired by a previous & popular Unbounce Infographic Post, How to Write the Perfect Email Subject Line will give you five tips you can use to write email subject lines that get your recipients opening and, ultimately, converting!
There are generally two types of emails businesses send to their customers: notifications and direct updates (newsletters).
It’s important to be clear about each campaign you’re working on as, just like writing any other copy, a lot of psychology is at play when it comes to the subject line. Whenever you’re working on a subject line you need to be absolutely clear about your goal.
When it comes to notifications (transactional emails) the best approach to subject lines is usually to be specific and let customers know exactly what they’re about to open. This might sound counter-productive but by letting the recipient know why you’re sending the email and what to expect is the best way to get their attention. The best way to get customers to open your emails is to get to the point. This doesn’t mean you need to reveal everything but, assuming your email is actually targeting a relevant segment, being upfront and honest will get opens.
Take this example from LinkedIn:
They let you know exactly what the email is about, reveal a little information to entice you and then leave you with a sense there is more to learn.
Another example comes from Perfect Audience with their conversion notifications:
Although this subject doesn’t have the longevity of LinkedIn’s it is effective because it is upfront, gets you excited and leaves the details of the conversion path to the body of the email. Once you’re reading the email Perfect Audience can then direct your attention as required.
When you’re not sending transactional or notification emails, you’re going to be sending newsletters or one-off campaigns, generally not triggered by any particular event. In this case the trick with subject lines is generally to be original and to pique curiosity.
Raising curiosity is no mean feat but a general rule of thumb is to ask questions.
Take this example from Kiva:
A part of their Mother’s Day campaign the subject line uses a single question to get your in head. After reading this subject line you might wonder: How good am I at what? An awesome example of how asking a question can get customers into the body of your email.
Another great email comes from Optimizely with this personalised sales follow-up:
…and a final example comes from Crazy Egg who combine the two tips above. They are straight to the point in asking for feedback but use a question to make the ask sound both fast and friendly. A great subject line.
Basic personalisation is very common these days. Starting your subject line with ‘Hey Chris, why do…’ is pretty standard, and perhaps a little ‘same old’.
This doesn’t mean you should give up on personalisation! Personalization comes in many forms. Using customer attributes and actions to tailor the email you’re sending and your subject lines is one of the most powerful things you can do.
EasyJet include the name of your destination in the subject line, based on your booking:
LinkedIn use people in your network and customers that have requested a connection to power their campaigns.
Another great example is this campaign from Memrise, you use the exact details of your last course / your most complete course in their subject lines:
When personalising your subject line, here are a few things you can A/B test:
Using auto-responders in order to email customers in series is an extremely powerful aspect of lifecycle email marketing. Series allow you to ensure your recipients know exactly who you are and give you the chance to build momentum, increasing your open rates dramatically.
Take Kareem Mayer, who blogs about his experience with a welcome series for his product SocialWOD. It’s evident that as his emails build he uses the power of the series combined with informative subject lines to build momentum.
GetResponse take this one further and actually include the ‘position’ the recipient is at in the series. This is really useful as it clearly identifies the email and, assuming the customer has had a positive experience with earlier emails in the series, adds to the power of the subject line, increasing opens.
Using series campaigns and flagging this in the subject line is a logical way to increase your email conversions. Most businesses send less emails than they could for fear of annoying customers. Spend time ensuring your emails are helpful and you won’t have this problem, allowing you to send emails in series that really convert.
You will commonly read that shorter subject lines increase opens.
This is just one example of a quote thrown around as fact but, the truth is, you can never be sure this will hold true for your own audience. Mailchimp recently published a whole bunch of statistics on subject line length that reveal the truth: there is no hard and fast rule when it comes to subject line length: it’s completely relatively to your target audience so you need to draw your own conclusions!
If you want to really nail your subject line then you should start testing. Dan Norris at Inform.ly recently shared a little trick with his readers: when sending out blog updates he A/B tests his subject lines in order to determine which title is best.
Here are some results from a recent campaign:
This is a great example of the power of testing when it comes to finding out what subject lines work with your audience. Short, long, with funny characters, CAPS, first-letter capitalisation, etc. are all things you should experiment.
Creating A/B tests is easy – when was the last time you A/B tested one of your subject lines?
These days email clients are getting pretty sexy and this means you actually have more than just the subject line to work with.
This article from MarketingSherpa shares how important it is to consider factors outside subject line length such as word choice and order. So, with this in mind, here’s the standard format of an email as your recipients will see it in Gmail:
…and here’s a similar example from Mailbox:
This format is fairly standard across desktop email clients, online clients (like Outlook and Gmail) and even mobile clients such as Mailbox.
As you can see, you should not only spend time optimising the subject line itself but also the from field and the short preview.
Here are three things you should try:
Here’s what to do next:
Catch you in the comments!