When it comes to email marketing, the subject line along with the sender’s name often are required to do all of the heavy lifting for recipients to even consider opening the email and see the offer or information communicated within.
Intermediate/ Digest...
Tip #1. Craft subject lines around themes that you can clearly categorize and differentiate between
Since copy is subjective and interpreted differently by each recipient, you must ensure you are testing subject lines that fall into specific themes and make sense to you and your team.
Tip #2. Determine the number of subject lines you can test based on your average open rate and list size
Since this is email testing, I recommend you test fewer than the full number of suggested subject lines in order to increase your odds of achieving results that are statistically significant and reliable.
Tip #3. Test the same treatments of subject lines in multiple sends
In my experience when testing emails with our Research Partners, I have often seen subject line performance vary widely from send to send. So if you test the same treatments in a series of email drops, you can reduce the chances of encountering a false positive in your results.
Tip #4. Dig deeper into the data during the test
While one treatment might boost open rate, how does it affect overall clickthrough and conversion rates? Finding an answer to a tough question like this will be a little more difficult if the focus on open rate becomes an obsession.
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