If I might provide one minute of context on what we're talking about.... If a website or app developer wants to integrate Facebook technology, they have the ability to do that. For example, if they want to put the Like button on their page, if you load the web page, your browser will send a request to Facebook servers to ask to receive the Like button, and then we'll obviously record that we have that information.
With regard to that information, we're using it predominantly to provide the Like button and to make sure that if you hit the Like button this is recorded in your profile. Also, it's for technical purposes to support advertising and in other ways.
With regard to that information as well, it's important that people have access to control it if they don't want that information to be used for advertising. They should be able to do that. Our practice is to delete and de-identify that information on a routine basis, independent of whether people exercise that.