Each subsection shows several key metrics. Click on a key metric to view one more charts related to that metric. Most of these charts feature options for breaking down the data in different ways, which you can change by using the dropdown found at the top right of the chart.
You can see additional details by hovering your mouse over different areas of the chart. Finally, clicking an area of a chart (one of the wedges of a pie chart, for example, or a column in a column chart) will load the related data in the area below the chart.