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Control

Quick answer

In the context of A/B testing and marketing, a control is the original, unchanged version of a webpage, email, or other piece of marketing content that is used as a benchmark to compare against a modified version, known as the variant. The performance of the control versus the variant helps determine whether the changes lead to improved results, like higher clickthrough rates, conversions, or other goals.

Key takeaways

  • Control helps define how an experiment is planned, run, or interpreted.
  • Clear terminology reduces confusion between marketers, analysts, designers, and developers.
  • Documenting it before launch makes results easier to trust and compare later.

Definition

In the context of A/B testing and marketing, a control is the original, unchanged version of a webpage, email, or other piece of marketing content that is used as a benchmark to compare against a modified version, known as the variant. The performance of the control versus the variant helps determine whether the changes lead to improved results, like higher clickthrough rates, conversions, or other goals.

What Control means in A/B testing

In practical experimentation, Control helps define how a test is structured and how results should be interpreted. Teams use it to align marketers, designers, analysts, and developers before an experiment goes live.

Why Control matters

Control matters because it affects how an experiment is designed, launched, interpreted, or acted on. Clear definitions help teams avoid comparing the wrong audiences, metrics, or variants.

Example of Control

For example, when launching a homepage experiment, the team can use Control to clarify the audience, variant setup, metric, or analysis method before traffic is split between experiences.

How to use Control

Use Control during experiment planning so everyone agrees on setup, measurement, and decision criteria. Document it before launch, then refer back to it when analyzing the final result.

Common mistake

A common mistake is using Control loosely without documenting the exact audience, metric, or variant definition. That makes test results harder to explain and easier to misinterpret later.

Related A/B testing terms

FAQ

What does control mean in A/B testing?

In the context of A/B testing and marketing, a control is the original, unchanged version of a webpage, email, or other piece of marketing content that is used as a benchmark to compare against a modified version, known as the variant. The performance of the control versus the variant helps determine whether the changes lead to improved results, like higher clickthrough rates, conversions, or other goals.

Why does control matter for experiments?

Control matters because it affects how an experiment is designed, launched, interpreted, or acted on. Clear definitions help teams avoid comparing the wrong audiences, metrics, or variants.

How should teams use control in an experiment?

Use Control during experiment planning so everyone agrees on setup, measurement, and decision criteria. Document it before launch, then refer back to it when analyzing the final result.

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