Demographics

Demographics in Analytics makes it possible to dig down into the Age, Gender, Location and interests of those visiting or engaging with your website. These statistics are collected by default by the Analytics tracking code, which means you have flexibility in the data reports you can generate, filtered or sorted by these demographic points. You can then go a step further by creating segments within your data, perfect as a precursor to retargeting specific segments of your demographics, so you can reach out to the most reponsive segments in your marketing.

http://www.demographics.com