The tools module is a command line like tool you can use to process hundreds of files in seconds. Some of the things you can do include:
1) Count the number of files in directories and subdirectories.
2) List and explore files like a file manager.
3) Copy, move, rename, or delete groups of pages with lightning speed. Purge pages after a specified expiration date.
4) A powerful directory wide search and/or replace feature. Great for finding markups that need to be upgraded.
5) Clean files from Microsoft Office special characters like fancy quote marks.
6) Can even manage files outside of your pages directory, such as images.