How Google improves search algorithm

Google is the best search engine on the Web, it's an undisputable leader. The accuracy of its results is also perfect. If Google Search doesn't find something, probably it's not available, or at least not publicly.

I enjoyed the video below because it makes evident that all the search enhancements made relies on the human factor. It's people who evaluate the accuracy of search results, the effective improvements achieved with potential algorithm updates, even help identify common misspellings that should be considered.

I agree that it's a scientific process and the Google search team really are scientists in the new ideas they have and the way they put them to test with real subjects: Humans.

A technology leader showing that huge amounts of data and vast infra-structure isn't enough to lead without people to sort it out: