Histograms are the most useful tool to say something about a bunch of numeric values. Compared to other summarizing methods, histograms have the richest descriptive power while being the fastest way to interpret data – the human brain prefers visual perception. However, if you are not careful, viewers will not be able to understand your histogram, or you may fail to get the most out of it. It is especially important to specify the optimal bin size. You can set the bin size under the visualization.