Excel sheets usually contains a lot of data and in order to go through all that data it takes time. Hence, you can create graphs in Excel. Graphical representation of the data can help the viewer save time. Also from it people can easily understand the results of something just by having a glance. Comparisons can be made between different months or products. Over here the numbers are replaced by column bars or lines so that the viewer can see which the longest bar is. Detail is written at the corner of the chart for understanding what does the vertical or the horizontal axis mean.
Follow this step by step tutorial to learn how to create a column chart in Excel fairly easily.