How To Test Subject Lines In Email Subject Lines

How to test subject lines in email subject lines.

How to test subject lines in email subject lines

Testing subject lines in email marketing can help you determine which ones are more effective in engaging your audience and improving open rates. Here's a step-by-step guide on how to test subject lines in email campaigns:

1. Define your objective: Determine what you want to achieve with your email subject line testing. Is it to improve open rates, click-through rates, or conversions? Having a clear goal will help you measure the success of your tests accurately.

2. Split your audience: Divide your email list into smaller segments. The size of each segment depends on the size of your overall list and the statistical significance you want to achieve. A 50/50 split is common for A/B testing, where you test two subject lines against each other. For more complex tests, you may divide your list into multiple segments.

3. Choose subject line variations: Create different subject lines to test against each other. Ensure that each variation is unique and differs in one key aspect. For example, you can test variations with different lengths, tones, personalization, or calls to action.

4. Establish a control group: If you already have a baseline subject line that performs well, you can use it as the control group. This allows you to compare the performance of new subject lines against the established standard.

5. Test one variable at a time: To isolate the impact of each subject line element, test only one variable at a time. For instance, if you want to compare the effectiveness of personalization, keep the rest of the subject line constant while changing the personalized part.

6. Randomly assign subject lines: Distribute the different subject line variations randomly across the segments. This ensures that any differences in response rates are due to the subject line itself and not the characteristics of the segment.

7. Monitor and track results: Send the email campaigns with the different subject lines to the respective segments. Monitor and track the performance metrics, such as open rates, click-through rates, and conversions. Most email marketing platforms provide analytics tools for this purpose.

8. Analyze the results: Compare the performance of each subject line variation based on your defined objective. Identify the subject lines that performed better and achieved your goal. Look for statistically significant differences to ensure the results are reliable.

9. Optimize and iterate: Based on your analysis, identify the winning subject line(s) and incorporate the insights into your future email campaigns. Continuously test and refine your subject lines to improve engagement and achieve better results.

How to test subject lines in email subject lines

Remember, subject line testing should be an ongoing process, as what works today may not work tomorrow. Stay informed about the latest trends, keep experimenting, and adapt your strategies based on the preferences and behaviours of your audience.

Related Post


Jarratt Davis
“..Extremely Professional, responsive. Quality of work second to none.”

Tom Breeze
“Expert marketer…Damian just gets it..super easy to work with…”

Sonia Stringer
Perfect fit!…A HUGE asset to my business…an absolute Whizz…”


institute for government
Infusionsoft, Membership site, WordPress
DNA Vetinary Group
error: Content is protected !!