December 2009 - Beginning today, Google will now personalize the search results of anyone who uses its search engine, regardless of whether they’ve opted-in to a previously existing personalization feature. Searchers will have the ability to opt-out completely, and there are various protections designed to safeguard privacy.
- Read more about this Google Now Personalizes Everyone’s Search Results
- A more recent article about personalisation – Of “Magic Keywords” & Flavors Of Personalized Search At Google