Quantcast Traffic Analysis
Quantcast is currently used by 9 of the top 10 media agencies, more than half of the top publishers (by ad revenue), and marketers from every major vertical to define, buy, or sell the audiences that matters to them most. When Quantcast is connected to planning, buying, and media fulfillment, they deliver the marketplace's purest audiences across a broad range of quality destinations.
By adding the Quantcast token to your website, public traffic statistics provide your customers with third party audits of your website traffic. Many websites try to confuse you with ambiguous stats (hits) to get your advertising business. Unique visitor stats collected by Quantcast provides unbiased information to verify website traffic and provides information about those visitors (age, sex, nationality, etc).
The best news, this is a free service!