Currently on the Internet, one of the fastest-growing business is to monitor Internet users, create a rich consumer database, and user information sold to consumers looking for potential advertisers or business.

Internet between users and ads, there are more than 100 intermediate agencies, including the tracking company, data brokers and a network of advertising and so on. They compete with each other to meet the business to consumer behavior and preferences of the growing data needs.

A similar auction of personal information in the stock market exchanges such as the past 18 months have sprung up.

According to statistics, consumer tracking of online advertising has now become the foundation. An industry source, like Google, Baidu, the search site, all in the pursuit of such a precise marketing model: According to the user’s information to determine their needs, then put the appropriate ads.