Google Dashboard which allows a top-level summary view of all your Google products that you use
As TechCrunch points out you this Dashboard does not include any of their cookie-based data collected through DoubleClick or their other ads. You need to use their separate Google Ad Preference Manager
Many of the ads you see online are based on ad networks such as Google, and they now allow you to ensure these ads are more relevant. By selecting your interests categories they can deliver more interesting ads but you can also elect to be opted out so ads are no longer associated with your browser.
You can also elect to expand this opt out to include some of the many other ad networks outside of google by selecting to opt out of the NAI member network.
By opting out of an ad network program using the NAI Opt-out Tool this should not affect other any services provided by NAI members that rely on cookies, such as email or photo-hosting.
The Network Advertising Initiative has adopted a policy that all NAI member companies set a minimum lifespan of five years for their opt out cookies.
By opting out of a ad network does that mean that you will no longer receive online advertising but these ads will no longer be tailored to your online usage patterns and web preferences. The Opt-out Tool was developed for the express purpose of allowing consumers to “opt out” of behavioural ads delivered by NAI member companies.
Your ads preferences only apply in this browser on this computer, so that if you use a different browser or delete your browser’s cookies these preferences need to be reset.