There's still a lot of speculation and conjecture about Google Caffeine. More than a few have analyzed and theorized based on the preview Google provided. Some have even given tips on optimizing for Caffeine. Don't believe the hype.
The Google Caffeine Myth
Google Caffeine is not an algorithm change. That's not to say that the results won't change here and there, but for the most part the actual scoring is unchanged. There are no special techniques or changes needed to address Google Caffeine.
What is Google Caffeine?
Google Caffeine is a re-architect of the entire indexing system for performance. In short, Caffeine:
- allows Google to crawl and index more pages
- allows Google to crawl and index pages faster
The result? The indexing data fed into individual signals is more robust and updated more frequently. This might produce some slight changes to results, but only because of the change in data, not in the change in scoring.
In Google terminology, Google Caffeine increases the rate of data refreshes. I recommend you read and listen to what Matt Cutts has to say on the topic. Vanessa Fox was also a voice of reason with her Search Engine Land Google Caffeine review.
Now, in re-architecting the indexing system, not all data structures are 100% compatible. So, some tiny changes have likely been made, but they're not meant to be algorithmic changes.
Why Ask For Caffeine Feedback?
Google provided the SEO community with access to Caffeine results and asked for feedback. This request was looked upon by many as an indication that this was an algorithm change.
In fact, this request was a type of distributed QA. The goal of the new indexing system is to increase performance but not appreciably change the algorithmic results. Letting a bunch of hyperactive SEOs into the sandbox helped them to identify any flaws to their re-architected code.
Why Re-Architect The Indexing System?
Most seem to believe the impetus for Caffeine was around real-time search. I'm sure this was factor, but I doubt it was the primary reason. Google could have pulled off real-time search without Caffeine.
The indexing code in use was written ages ago in Internet-time. Since that time, the Internet has grown and changed dramatically. Algorithmic changes and new signals could only go so far in ensuring quality results. If the data set they were using was incomplete or 'old', no amount of signal tinkering would have the desired impact. It's a simple GIGO problem.
Google needed more data to better inform the algorithm. They need to see more of the Internet. More links. More page changes. Any of you who have ego based Google Alert feeds would have noticed a substantial increase in activity over the last month. It's not that you're getting more popular (sorry), Google's just indexing more and doing so faster than ever before.
Caffeine Is The Beginning
The real question should be what will Google do once Caffeine is fully implemented. Once Google gets all of this data, new patterns will emerge and algorithm changes are certain to follow.