The registrant will see every course they have added to their cart. They can remove courses, search more, or start the checkout process at this point.
Even activities that have no cost can be included such as orientations or free seminars, yet still enforce the maximum enrollment through Web Registration.
And by the way, see the URL links in the header and footer? You control those and can display up to five links. Maybe you link back to important information on your website or to a PDF version of your current course catalog for those customers that want to print a copy of the catalog.