This cache contains temp files stored under application specific program file location. (thewindowsclub.com)
If you set it at say 1, it will not clean the last 1 days temp files. (thewindowsclub.com)
Third - party applications Removes temp files and recent file lists (MRUs) from many apps including Windows Media Player, eMule, Google Toolbar, Microsoft Office, Nero, Adobe Acrobat, WinRAR, WinAce, WinZip and many more... (ccleaner.com)