A temporary storage area in memory or on disk that holds the most recently downloaded Web pages. As you jump from Web page to Web page, caching those pages in memory lets you quickly go back to a page without having to download it from the Web …
Caching means placing something in storage (usually in secret) on the chance that it may come in useful later (e.g. a weapons cache). A browser or Web cache does exactly that, except with program and website assets.
