There's lots of little files accumulating on your computer... like bacteria. Every time you browse the interenet, little bits of data are saved onto your hard drive.
Every browser has an interface to clean up all of these files, but you have to go to several differnent places to clean them all up... which is very tedious if you like to clear this out frequently. Fortunately, all of these functions are available via the command line, which means you can automate all of these tasks. You can integrate this batch file with your existing logon or logoff scripts, or just have the file on your desktop for one-click cleanup!