Email marketing terms

Browse by...
Home Resources Glossary

Email A/B Testing

Email A/B testing is a strategy used to test a single element of an email in two different versions to find the version that performs best. This tactic is often used by marketers looking to find the most effective possible version of their email.


In “Subject line 1”, you used a personalization tactic, like including the subscriber’s first name.
In “Subject line 2”, you used an information gap to build a sense of curiosity.

To conduct the email A/B test, the two versions would be sent to only a portion of subscribers to determine which version was more effective. From there, the remaining subscribers would be sent the winning version.

Previous glossary term
Dynamic Content
Next glossary term
Email Automation
Straight to your inbox

Get the best email and digital marketing content delivered.

Join 250,000 in-the-know marketers and get the latest marketing tips, tactics, and news right in your inbox.


Get started with Campaign Monitor today.

With our powerful yet easy-to-use tools, it's never been easier to make an impact with email marketing.

Try it for free
Contact Sales