An application stores stores all recently used information in the cache so that it can be accessed again with increased speed. When the same operation isperformed again, the corresponding cache will be read and the task will be completed in less time.
Because the cache stores data transparently, users have no control over its contents, but they may adjust its size to make sure it does not take up too much space.
Cache cleaning applications will allow one to erase all the stored data in order to free hard disk space.
These type of apps will also help users to maintain their privacy on Macs shared by several persons.