A clustered column chart

places $($stacks$)$ data in one column per category; with each column having the same height of $100\%.$

is a key that identifies the color, gradient, picture, texture, or pattern fill assigned to each data series in a chart.

places stacks of data in segments on top of each other in one column, with each category in the data series represented by a different color.

groups or clusters similar data in columns to compare values across categories.