It won't work for you if you have no google account, you have to log in and go to http://www.google.com/ads/preferences, so here's a story about it with images: http://uk.businessinsider.com/what-google-knows-about-you-20...

When it was doing the rounds a couple of years back plenty of people were commenting how often it got age and gender wrong. Sometimes it was widly inaccurate on interests too.

Thank you. It's been a while since I had a Gmail account.