What is a bubble chart used for in Tableau?

A bubble chart is particularly effective for showing relationships between three dimensions of data. Each bubble represents a data point and its location on the chart correlates to two dimensions, typically along the x and y axes. The size of the bubble can represent a third dimension, allowing for a more nuanced analysis of the data.

This multi-dimensional representation helps in visualizing patterns or correlations among the three variables, making it easier to identify trends and relationships that might not be obvious if only two-dimensional graphs or individual metrics were used. By using the size of the bubbles as a measure, you can also convey an additional layer of information, enhancing the storytelling aspect of your data visualization.

The other options focus on different types of visualizations that are not characteristics of bubble charts; for instance, segmented bars pertain to bar charts, time-series trends relate to line graphs or area charts, and geographical data visualization is typically represented using maps.