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Baseline

Quick answer

A baseline in marketing is the starting point by which you measure change or improvement in a campaign or strategy. It's a reference point that allows you to compare past performance to current performance after implementing new changes or strategies. In A/B testing, it helps teams connect a term, metric, or behavior to a clearer optimization decision.

Key takeaways

  • Baseline gives teams shared language for experiment planning and analysis.
  • It should be tied to a clear metric, audience, behavior, or decision whenever possible.
  • Consistent definitions make optimization work easier to compare across tests.

Definition

A baseline in marketing is the starting point by which you measure change or improvement in a campaign or strategy. It's a reference point that allows you to compare past performance to current performance after implementing new changes or strategies. By establishing a baseline, you can measure the effectiveness of your marketing efforts and identify areas for improvement.

What Baseline means in A/B testing

In A/B testing, Baseline gives teams a clearer way to describe user behavior, measurement, or decision-making. It is most useful when connected to a primary metric, a specific audience, and the decision the experiment is meant to inform.

Why Baseline matters

Baseline matters because measurement terms shape how teams judge experiment outcomes. When the definition is clear, marketers and analysts can connect the result to a real user behavior, metric, or business decision instead of relying on vague performance claims.

Example of Baseline

For example, a growth team may test a new landing-page message and use Baseline to understand whether the change affected the intended behavior. The term helps turn a test result into a specific next step instead of a generic statement that the page performed better or worse.

How to use Baseline

Use Baseline as part of your experiment documentation. Define the metric or behavior it refers to, choose where it fits in the funnel, and use the same definition when comparing results across tests.

Common mistake

A common mistake is using Baseline as a vague label instead of tying it to a measurable behavior or decision. If different teammates mean different things by the same term, experiment planning and result interpretation become less reliable.

Related A/B testing terms

FAQ

What does baseline mean in A/B testing?

A baseline in marketing is the starting point by which you measure change or improvement in a campaign or strategy. It's a reference point that allows you to compare past performance to current performance after implementing new changes or strategies. In A/B testing, it helps teams connect a term, metric, or behavior to a clearer optimization decision.

Why does baseline matter for experiments?

Baseline matters because measurement terms shape how teams judge experiment outcomes. When the definition is clear, marketers and analysts can connect the result to a real user behavior, metric, or business decision instead of relying on vague performance claims.

How should teams use baseline in an experiment?

Use Baseline as part of your experiment documentation. Define the metric or behavior it refers to, choose where it fits in the funnel, and use the same definition when comparing results across tests.

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