No, Google Caffeine isn’t the latest drink at Starbucks. It’s the latest version of the Google search algorithm and it may affect your search engine standings.
Google is always striving to bring people better search results. So from time to time they change the way they calculate search results by changing their search algorithm. It’s like they’re updating the internal software that runs the search engine. But that means that people who are number one for a search term right now may not be number one once the new algorithm, codenamed Caffeine, rolls out. On the other hand, if you’ve been frustrated because you can’t attain the number one spot for a certain keyword phrase your troubles may be over.