A line chart is good for observing the flow of your data over a stretch of time. It’s also great for comparing different values, understanding the distribution of your data, and identifying data trends. Column charts have almost the same use as line charts. The only difference is that columns clearly show the size of each data point. Bar graphs are identical to column charts, only that they show the data horizontally. This layout is more convenient when the labels contain a lot of text. Another great use for bar graphs is to show negative values, as the graph doesn’t take up a lot of vertical space on the page. Pie charts find uses in showing the composition of the individual parts of a whole, especially in percentages. For example, if you want to display the share of each browser type used by your website visitors.