Demographic targeting continues to grow in popularity. A lot of clients want to use age and gender in their campaign targeting and want to find out more about these options. Dividing consumers into groups based on age and gender can greatly help advertisers determine their target audience for particular products and develop ads geared toward a specific demographic. With that in mind, it could be helpful to share additional details about how demographic targeting data is gathered, including a discussion around approximately how much impression inventory is available that contains demographic data.