You may be able to use the dimension values to refine the data.
For example, if the data is grouped by sales year, then when you click the category axis label for 2010, the data is refined to only include records for 2010.
The selected value is added to the Breadcrumbs component.
If a chart dimension is configured to allow cascading, then when you refine the data using that dimension value, the chart may be updated to use a different dimension. For example, if the chart displays values grouped by country, when you refine the data by a specific country, the chart may be updated to group the values by state for the selected country.