Evaluating visual metaphors for data visualization involves testing, feedback, and iteration. To start, you should try out different visual metaphors and experiment with shapes, colors, sizes, and layouts to see how they affect the readability and attractiveness of your visualization. Ask for feedback from your audience or other experts to see how they react to your visual metaphors - do they understand them, like them, remember them, or trust them? Based on the feedback, you can refine your design, adjust your data, or change your metaphors if needed until you achieve your desired outcome. Visual metaphors are a great way to communicate complex ideas with data visualization as they can make your data more accessible, engaging, and memorable. By following the tips and examples in this article you can use visual metaphors effectively in your data stories and impress your audience with your creativity and clarity.