Cache

A cache (pronounced /kæʃ/ or "cash") is a reserved area of memory in a computer that is used to speed up instruction execution, data retrieval, and data updating.

A web cache is a folder full of web pages on the user's computer that is maintained by the browser for a period of time. If a web page has not been updated on the web, it can be retrieved immediately by the browser, saving download time.

A browser cache is a temporary storage area in memory or on disk that holds recently downloaded Web pages. This allows you to return to a page quickly without having to redownload it again.