---
title: "What is Bayesian?"
url: https://fibr.ai/glossary/bayesian
description: "Bayesian statistics updates probabilities using prior beliefs and new evidence through Bayes’ theorem—helping you make smarter, data-driven decisions."
last_updated: 2026-05-05T11:55:58.078625+00:00
---
Bayesian methods apply probability theory in a way that continuously refines predictions based on incoming data. Unlike classical statistics, which rely on fixed assumptions, Bayesian analysis adapts as new information emerges. In A/B testing, this approach can show the likelihood of one variation outperforming another in real time, without waiting for a fixed sample size. It gives decision-makers faster, more flexible insights into experiments.

### Explore more Glossary terms


##### Bucket Testing

Bucket testing is another term for A/B or multivariate testing where users are split into groups (“buckets”).

Read More


##### Breadcrumb Navigation

Breadcrumb navigation is a secondary navigation system showing a user’s location within a site hierarchy.

Read More


##### Brand Engagement

Brand engagement is the emotional connection and interaction between a customer and a brand.

Read More


##### Bounce Rate

Bounce rate is the percentage of visitors who leave a site after viewing only one page.

Read More


##### Below The Fold

Below the fold refers to the part of a webpage that users see only after scrolling.

Read More


##### Behavioral targeting

Behavioral targeting is the practice of delivering ads or content based on a user’s past actions and behaviors.

Read More

Delaware, USA

Subscribe to our newsletter for exclusive updates and insights.