Have you ever wanted to create a bar chart, or perhaps a series of bar charts, but not needed the axes? Your first thought was probably to go into the axis settings and turn them off manually.
There is an easier way: drag your measure into size, rather than into rows.
From this:
Bar chart using row
To this:
Bar chart using size
Similar but cleaner layout, but with the drawback that the labels then take a little more adjustment. Tableau has many ways of getting to the same or similar endpoint.