# Statistical Significance

For any campaign with more than one variation, we calculate the Probability to Be Best, which is an equivalent to statistical significance in Bayesian statistical theory. Within this approach, the system takes into account all user interactions with the campaign and adjusts the statistical forecast based on each of these interactions in real time. You can find more details about this approach by the following links:

1. Statistical Significance Calculator (Bayesian) by Dynamic Yield: [**https://marketing.dynamicyield.com/bayesian-calculator/**](https://marketing.dynamicyield.com/bayesian-calculator/)
2. Article on Bayesian statistics on Wikipedia: <https://en.wikipedia.org/wiki/Bayesian_statistics>
3. Detailed research on the Bayesian approach to A/B testing by VWO:

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