Ghostery is for all those users who care about their online privacy and it has been engineered keeping privacy as its primary goal. Ghostery use is completely anonymous without any registrations, sign-ups etc. Even it never places session cookies in your web-browser and neither its application nor evidon receives any kind of data from its users unless its users opts-in to participate in GhostRank whose data is anonymous and it is never used for advertising or targeting purposes, and is only shared in an aggregated, non-personal, statistical form.
Ghostery is a powerful Chrome app that sees “invisible” web, detecting web trackers, web bugs, pixels, and beacons placed on web pages by Facebook, Google Analytics, and over 500 other ad networks, behavioral data providers, web publishers and all other companies interested in your online activity.
Other than this it also includes optional, opt-in feature called GhostRank, which sends Ghostery servers anonymous information about all trackers you encounter and where you encounter them so that they improve and provide you better service.