> For the complete documentation index, see [llms.txt](https://docs.carto.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.carto.com/carto-user-manual/maps/widgets/category-widget.md).
# Category widget
A Category Widget summarize and compare categorical data using proportional bar lengths to represent values. The longer the horizontal bar, the greater the value it represents.
Category Widget in Builder for United Kingdom insights
### Widget Data
When configuring the Category Widget, you can either perform a simple `COUNT` operation over your define category field or you can perform an aggregated operation using `AVG`, `MAX`, `MIN`, or `SUM` on your define numeric field for each of the specified categories. For example, you can calculate the SUM population for each land use category.
Performing an aggregation operation with Category widget
For more complex and custom calculations, you can select the *custom aggregation* option to create your own SQL Expression. With this option, you can use a wide range of SQL functions, operators and syntax using single or multiple columns from your data source.
Custom aggregation using SQL Expression
### Widget Display
From **Display options**, you can adjust the **formatting** of the values displayed. You can also use the **Order by** option to sort values **alphabetically** (ascending or descending) or by **value** (ascending or descending), including aggregated values. The default is **value descending**.
Additionally, you can add notes that support [Markdown syntax](https://www.markdownguide.org/basic-syntax/) to provide further context to users.
### Widget Behavior
Within the "Behavior" section, you can define how your widget operates by choosing between **"Viewport" or "Global" modes**.
You can also enable or disable the widget’s filtering capability using the **cross-filtering** toggle icon. When enabled, the widget can filter itself and other components connected to the **same data source** or across **multiple sources** if they share the same property.
Learn more about widget behavior [here](/carto-user-manual/maps/widgets.md#widget-behaviour).
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