If you use Gmail, your search results will be 'personalised' by Google. If you are signed in, your results will really be tailored to reflect what you have previously clicked on. Even when you are not signed into a Google account, your experience will still be personalised based on past search information linked to a cookie in your browser. 


I don't think that most users are aware that Google is doing this for them. Is this a good or a bad thing? What do you think?