Do Not Track is a technology and policy proposal that enables users to opt out of tracking by websites they do not visit, including analytics services, advertising networks, and social platforms. At present few of these third parties offer a reliable tracking opt out, and tools for blocking them are neither user-friendly nor comprehensive. Much like the popular Do Not Call registry, Do Not Track provides users with a single, simple, persistent choice to opt out of third-party web tracking.
Do Not Track signals a user's opt-out preference with an HTTP header, a simple technology that is completely compatible with the existing web. Several large third parties have already committed to honor Do Not Track, but many more have been recalcitrant. We believe regulation is necessary to verify and enforce compliance with a user’s choice to opt out of tracking.
Even though websites technically don't have to follow this, it's still a nice effort.
