Demographic Site Selection on AdWords
If you participate in the AdWords Content Network, Google now provides you with more information about partner sites, allowing you to select properties based upon your target demographic. In essence what they provide is the ability to filter their large list of content partner sites down to a subset that has the viewer characteristics that you specify.
It is important to recognize that ads and program are not any different than they were before. This new capability simply helps you select the most appropriate content sites.
More information can be found here.