A balloon chart, also known as a bubble chart, is a type of data visualization that displays data points in the form of bubbles or balloons on a two-dimensional graph. Each bubble represents a data point.
The position of the balloon on the x and y axes indicates the values of two variables. Make the balloons equal sized or size them as per the magnitude of a third variable. They make for a visually intuitive graphic.
Check out the stepwise instruction on how to make balloon chart in excel.