It allow you to map filename with their title. Links stats This is the number of links on your website. The histogram show how often pages contains links. Both external and internal links are counted. If your website is heavily linked, graphs will growth to the right side.
Black bar is the average.
The list of the most numerous links per page is displayed. The number of images per page is displayed on the histogram. Heavily imaging website show a growth on the right side of the graph. List of pages with most images are displayed. Not only the weight of the HTML file is count but also files need to be downloaded to get full display.