Google automatically forms a cache of your site; however, you can disable this.
I use Google’s cache all the time. Websites get slashdotted or are down for some reason, and Google keeps a nice copy for your pleasure. Google cache is another excellent place view information if the page you want to view is blocked such in a restricted enterprise environment. Typically, google cache is a healthy function for both the publisher and the reader.
However, some sites contain a lot of private information. Other people may have a problem with Google keeping a copy of their information for copyright reasons. Google has created a meta-tag that prevents the google bot from archiving your content.
Placing the following meta-tag in the head of your webpage will prevent Google from forming a cache of your site:
<meta name=%u201Dgooglebot%u201D content=%u201Dnoarchive%u201D >