for Web Authors and Webmasters This is an informational document.Although technical in nature, it attempts to make the concepts involved understandable and applicable in real-world situations.Because of this, some aspects of the material are simplified or omitted, for the sake of clarity.
There are two main reasons that Web caches are used: If you examine the preferences dialog of any modern Web browser (like Internet Explorer, Safari or Mozilla), you’ll probably notice a “cache” setting.
This lets you set aside a section of your computer’s hard disk to store representations that you’ve seen, just for you.
The browser cache works according to fairly simple rules.
It will check to make sure that the representations are fresh, usually once a session (that is, the once in the current invocation of the browser).
This cache is especially useful when users hit the “back” button or click a link to see a page they’ve just looked at.