Google completed work on the new search index called Caffeine. First of all what is a search index? The search index is the priority stack that stores copies of webpages crawled by search engines. Google old Search Engine use to take laps on all webpages indexed to refresh for new information.
Old Google Search Index crawling laps searching for new and fresh content use to take days to complete which means if you publish today, your post will be indexed 5 days or so later.
The delay for crawling and indexing fresh contents means that users that are searching for specific information will get relatively old data.
What's New in Google Caffeine?
Caffeine the new Google search index introduced a new perspective on search engine results. You don't have to expect old data and outdated webpages anymore. Caffeine will give you the pleasure of having fresh and up to date search results. For webmasters and publishers Google Caffeine means that your posts and pages will be crawled and indexed faster by Google Caffeine. This will greatly reduce delay time from the moment the publisher hits the publish button to the moment the content is available for readers.
Bottom Line ( Expect Faster Crawling and Indexing from Google )
Make sure you write new articles and posts on your website to catch your share of Caffeine fresh content Google ranking factor. You can search for new articles on article websites and use them on your website with a trackback to the original posted article getting new fresh content the easy way.