In communications for advocacy, time is short and it's best to call attention to the main takeaway as quickly and clearly as possible.
One way to do this is by creating a visual hierarchy within your information.
Visualization studies also found that the most recognizable visualizations had a clear center of interest. Eye-tracking software determined that the most recognizable visualizations had a single focus, whereas the least recognizable visualizations had less singular patterns.
Visualizations can use emphasis and contrast by differentiating the key figure with color, shape, length, or other visual characteristics.
The order of marks and labels can also create both a visual and logical hierarchy: categories can be ordered alphabetically or by value.