This graphic and functionality measures the distance a user has progressed through a Folder in a course. This function counts the total number of publicly-viewable screens in the current Folder, calculates a "percent complete" for the Folder, and displays it with a Progress Bar graphic.
The Content Editor may set the Progress Bar to be displayed on individual pages. Under the Page Options section:
Select the check box for "Show Progress Bar"
Select the "Set Page Options" button.
The Progress Bar graphic will now be viewable on the public site for that page.