After you create a chart, you might want to change the way that table rows and columns are plotted in the chart. For example, your first version of a chart might plot the rows of data from the table on the chart's vertical (value) axis, and the columns of data on the horizontal (category) axis. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.