Email Split Test Guide: The Most Important Metrics

1. Subject Lines - the most common email split test in ecommerce

  • Tone: Casual vs. formal language.
  • Length: Short vs. long subject lines.
  • Personalization: Using the recipient’s name vs. generic terms.
  • Punctuation: Use of exclamation marks, questions, or other punctuation.
  • Emoji Usage: Including emojis vs. no emojis.
  • Keywords: Different wording or phrasing.

2. Preheader Text

  • Content: Different messaging or calls to action.
  • Length: Short vs. detailed preheader text.
  • Personalization: Including personal details vs. none.

3. Email Copy

  • Tone: Friendly vs. professional language makes a difference in ecommerce.
  • Length: Short and concise vs. longer, detailed copy.
  • Structure: Paragraphs vs. bullet points.
  • Personalization: Using the recipient’s name, location, or preferences.
  • Messaging: Different value propositions or calls to action.

4. Call to Action (CTA)

  • Placement: Top, middle, or bottom of the email.
  • Design: Button vs. text link.
  • Color: Different button colors.
  • Text: “Buy Now” vs. “Shop Today” or “Learn More” vs. “Read More.”
  • Number of CTAs: Single vs. multiple CTAs.

5. Images

  • Use of Images: Images vs. no images.
  • Image Type: Illustrations vs. product photos.
  • Image Size: Large vs. small images.
  • Image Placement: Above the fold vs. below the fold.

6. Email Layout

  • Design: Single-column vs. multi-column layout.
  • Responsive Design: Testing different mobile layouts.
  • Text vs. Visuals: More text-heavy vs. image-heavy emails.

7. Sender Name

  • Brand Name: Using the company name vs. a person’s name.
  • Personalized Sender: Using a real person’s name vs. a generic name.

8. Timing

  • Send Time: Morning vs. afternoon vs. evening.
  • Day of the Week: Testing different days to find the best one.
  • Frequency: Testing different intervals between emails.

9. Segmentation

  • Audience: Different segments of your email list (e.g., new vs. returning customers).
  • Content Variation: Tailoring content to different segments to see which resonates better.

10. revenue generating email split test: try Offers and Incentives

      • Discount Type: Percentage off vs. fixed amount off.
      • Urgency: Limited-time offers vs. ongoing promotions.
      • Free Shipping: Free shipping vs. other incentives.

11. Social Proof - important in ecommerce

        • Customer Reviews: Including vs. not including testimonials.
        • Trust Badges: Displaying certifications or badges vs. none.
        • User-Generated Content: Featuring customer photos vs. only product images.

12. deliverability email split test: Footer Content

          • Contact Information: Detailed vs. minimal contact information.
          • Unsubscribe Link Placement: Prominent vs. subtle placement.

13. Personalization

  • Dynamic Content: Personalized content blocks vs. generic content.
  • Variable Data: Using personalized data points (e.g., past purchase behavior) vs. none.

14. Interactive Elements

  • Surveys: Including a short survey vs. none.
  • Polls: Adding interactive polls vs. static content.
  • GIFs/Animations: Using animated elements vs. static images.


Check out our email flow automation here for more.

are you an ecommerce brand Wondering how to create an email split test? Read this post.