For most results, Google holds an archived or ‘cached’ copy of a page.
What this means is that the page in the cache will load quicker for the visitor, and the search terms will be highlighted.
However, problems arise when the cached version of a page and the current version are out of sync.
You can tell google NOT to cache your page by using the following META tag
in the head tag of your page:
meta name=”GoogleBot” content=”noarchive”