4shared: A Case of Complex Ad Serving

摘要

4shared has been providing customers with free file sharing and hosting services since 2005. It allows users to upload, store, and download a variety of data and media-from music to video to documents. With a staff of programmers, marketers, and web designers, the site is visited by about 132 million monthly unique visitors. The company supports its free services, in part, by running advertising on its site.