A/B test subject lines
Optimize subject lines through testing
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Design an email subject line A/B test for [email type: newsletter / promotional / nurture] to [audience size: N subscribers]. Define: the hypothesis being tested (e.g., 'personalization increases open rate'), control and variant subject lines, test audience split (50/50 or winner-send), duration before declaring winner, statistical significance threshold, and what you will change in future sends based on each possible outcome.
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Ajoutez une mesure secondaire comme le taux de clics (CTR) pour éviter les lignes d'objet trompeuses qui gonflent l'ouverture mais augmentent le désabonnement. Testez sur au moins 500 abonnés par variante pour une puissance statistique minimale.
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