BBC: Just google it: The student project that changed the world. “Google dominates the search market, handling close to 90% of searches worldwide. Many businesses rely on ranking highly in its organic search results. And Google constantly tweaks the algorithm that decides them. Google gives general advice about how to do well, but it is not transparent about how it ranks results – not least because that would give away the information necessary to game the system. We would be back to searching for cars and getting porn.” I do not agree with everything in this article – actually I yelled at the monitor a couple of times – but it’s a good backgrounder.