How do I set up an effective abandoned cart email sequence?

How Do I Write Email Subject Lines That Get Opened?

Email subject lines determine whether 20% or 45% of your list reads your message - a difference that can double the revenue generated by each campaign. For cosmetics brands, curiosity and specificity consistently outperform hype and generic promotional language.

Subject Line Types and Open Rate Impact

Subject Line Best Practices for Cosmetics

• 40-50 characters: Visible fully on mobile without truncation
• Lead with the hook: Most important information first (not "FYI:" or "Quick note:")
• Test numbers: "5 signs your skin is dehydrated" consistently outperforms non-numeric equivalents
• Avoid spam trigger words: "FREE!!!", "Act now", "Limited offer" (all caps, excessive punctuation)
• Personalization when accurate: "[Name], your skin type needs this" - but only when your data is reliable

Testing Subject Lines in Klaviyo

Use Klaviyo's built-in A/B testing for subject lines:

1. Test subject A (benefit-focused) vs. subject B (curiosity-focused) with 20% of your list each
2. Let it run for 4 hours to determine the winner
3. Send the winning subject to the remaining 60%
4. Build a spreadsheet tracking your wins and losses over time to identify patterns