Web Analytics
Web Analytics is software that carefully tracks the behavior of visitors on your website. It does not draw traffic to your site, but it can help you create a more user-friendly and more profitable website. This detailed information is used to maximize conversions and ROI. It is expensive and is (arguably) only worthwhile for e-commerce sites.

The top players in the web analytics game:

Driven by InSite 4.12, from www.inSitesWebServices.com