Do you mean the list under Cleaner/Applications? If so then when you press the Run button files which CC considers to be junk will be removed from those applications which are ticked. Just run an Analyse and right-click on any of the results and select Detailed Results to see what's about to be deleted. You can also right-click on each or any of the l/h entries and run Analyse for a specific and shorter list of what will be deleted.