It is common that advertisers ask for website demographics before they decide to advertise on your website. However, certain data such as gender and age are not available on any web statistic report. The webmaster can only get the data through running a website survey.
Now, Microsoft adCenter Labs might have an alternative solution to predict demographics, the Demographics Prediction.

Image: Microsoft adCenter Labs Demographics Prediction
From the demographics prediction of LiewCF Tech Blog, 64% visitors are male and the age is between 25 to 34. I do not have the exact data but I would say it is accurate to what I expected.
Besides predict demographics for a website, the Demographics Prediction also works for search queries. For example, “hello kitty” query is female-oriented (74%) and age: 25 to 34.
Try Demographics Prediction on your sites and tell me what do you think!
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