Description of Line, Pie and Columns charts of WordPress Google Analytics plugin.
Line. Choose this option to view your website traffic with a line chart. Hover the chart points to check the values of each metric. These values are also displayed under the chart.
Pie. View your website traffic results within a pie chart by selecting this option. Values will be calculated as percentages.
Columns. This option builds a column chart based on selected Google Analytics tracking report of your website. Hover each column to check metrics results on specified dates.