Subject Line Tester

Find out how your message’s subject line is likely to influence message performance. Test the performance of a single message or compare up to 10 subject lines. The subject line tester is available only if you opt in to global models. Subject line tester won't appear on the dashboard if global models aren't enabled. You can also use the tester to analyze subject lines generated in Einstein Copy Insights if you have Einstein generative AI features and global models enabled.

In addition to opting in to global models, the Einstein Copy Insights dashboard and subject line tester require some information before making predictions. Your business unit needs at least 10 subject lines with at least 30 deliveries in the last 90 days before Einstein can provide predictions.

When you evaluate your subject lines using the performance tester, Einstein compares the subject line with most other subject lines sent over the past 90 days. Einstein evaluates the subject lines as they appear in your subscriber’s inbox, even if you create and personalize them with AMPscript.

Einstein also tests the subject line for potential bias. Salesforce defines bias as using a person’s immutable traits to classify them or market to them. If the subject line contains words flagged as introducing potential bias, you can choose to address them before sending the message.

To help you understand how the predicted performance compares to your own past performance in a business unit, contextual analytics appear after you test a subject line.

A model confidence score of 1–5 indicates Einstein’s confidence in the model. A score of five indicates the highest confidence rating.

A data quality score of 1–5 indicates how effectively Einstein is using your subject line data for intended use in engagement prediction. A score of 5 means that your subject lines are effective for the model.

• Test a Subject Line Before You Send
  Find out how your message’s subject line is likely to influence message performance. Test the performance of a single message or compare up to 10 subject lines.