If you don’t compare your email signature campaigns, it’s difficult to know what actually works.
A campaign may generate clicks, but is it performing as well as it could? Without a benchmark, there’s no way to measure success or improve results.
A/B testing solves this by comparing two versions of a campaign to identify which performs better.
How A/B testing works
The process is simple:
- Create one email signature campaign (Campaign A).
- Create a second variation (Campaign B).
- Run both campaigns at the same time.
- Measure performance using click-through rate (CTR).

What to measure
Focus on click-through rate (CTR), which shows how many recipients clicked your campaign compared to how many viewed it.
This gives you a clear, objective way to compare performance between campaigns.
What happens next
After running both campaigns for a period of time, you will have enough data to identify the better-performing version.
- Use the winning campaign as your primary campaign
- Replace the lower-performing version
- Repeat the process to continuously improve results
Best practices
- Test one element at a time (e.g. headline, banner, or call-to-action)
- Run campaigns long enough to collect meaningful data
- Avoid making changes during the test period
- Use clear and consistent calls-to-action
By continuously testing and refining your campaigns, you can improve engagement and maximize the impact of every email sent.
