What makes a subject line work
Good subject lines are clear about what's inside, relevant to the reader, and short enough to read on a phone. Curiosity can help, but misleading subject lines damage trust and can lead to unsubscribes.
Brainstorm with AI
Paste your email into AI and ask for ten subject line options in different styles: direct, question-based, benefit-focused, and time-sensitive. Choose the ones that sound most natural for your audience.
Styles to try
- Direct: "Your spring AC tune-up reminder"
- Question: "Is your water heater ready for winter?"
- Benefit: "Three ways to cut your energy bill this month"
- Personal: "A quick update from our team"
Avoid spammy habits
All caps, excessive punctuation, and exaggerated claims can hurt deliverability and trust. Ask AI to avoid these.
Preview text matters
The preview text appears next to the subject line in many inboxes. AI can write preview text that complements the subject line.
Test when possible
Many email platforms let you test two subject lines on a small portion of your list. Use the winning style to guide future emails.
Learn from results
Track open rates over time and notice which styles perform best for your audience. Share those examples with AI when writing future subject lines.
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