# Bubble Chart

> This documentation contains information on what a bubble chart is, when to use bubble chart visualization, and how to create a bubble chart in Holistics

Bubble Chart is an extension of [Scatter Chart](scatter-chart.md). It still displays data points on a two-dimensional graph using values from two variables, but it can format the points' **sizes** based on a **third dimension.**

## When to use Bubble Chart?

While a Scatter Chart is useful, sometimes it is not visually interesting enough to catch the attention of your end-users. That is when the Bubble Chart comes in - to make your visualization more striking. 

Exploring three dimensions at the same time can lead to interesting insights. For example, Mobiles and T-shirts are on the two extremes of the price range, but the total value they bring is roughly equal.

## Create a Bubble Chart

Creating a Bubble Chart is similar to building a Scatter Chart, with the only difference of the **Z-axis.** This is where you put a third dimension to represent the size of the data point.

Unlike X-axis and Y-axis which discrete variables are acceptable, **Z-axis only makes sense with continuous variables.**