Google's New Caffeine Search Indexing Tech: What It Is, and Why You Should Care

Google's Caffeine isn't a new mobile app or fancy bit of desktop-to-cloud software, like we're used to from Google. Instead it's a massive change to the underlying tech which powers Google's search. Caffeine will remain unseen, but you'll use it all the time.

Currently, Google indexes the web in layers. Some are scanned at shorter intervals than others, and the main layer is scanned every few weeks. That means there could be some delay in terms of when it's published to the web and when it's...