Most know their movements are tracked while they surf the web (primarily for advertising reasons) and some of us even use additional software tools to help reduce of that tracking. One of tools I use is Firefox (instead of Internet Explorer). With Firefox, I have a little more contrrol over my privacy and advertising.
For those who don't know what Firefox is, it's an internet browser (like Internet Explorer). I've been using it for years, but only started recommending it to my clients in past couple of years. Before Internet Explorer 7 was released, Firefox confused a lot of people. But now that Microsoft has copied Firefox (with the release of IE7), more and more people are comfortable using it.
The new "Do Not Track" feature (when enabled) will basically tell web sites that you've opted-out of online advertising behavior. In response, they're not supposed to track your movements through their site for advertising purposes.
No doubt, some sites will try to counteract this feature by posting messages that some features of their site may not function properly with the "do not track" feature enabled. My response .... ignore the messages. As long as you're seeing and doing what want a web site, there's no reason to disable the feature.
For more information about the "Do Not Track" privacy tool in Firefox, click here.