[marshray]

Don't confuse "internal secrecy" with "user privacy".

That user data is company property and its secrecy is what gives it value. Furthermore, if users caught wind of just how much of it exists that could jeopardize its source.

[jrockway]

We tell users exactly how we use their data. We're even running an ad campaign on the NYC subway (and presumably elsewhere) about how we use user data in non-intuitive ways.

Here's the relevant section:

http://www.google.com/goodtoknow/data-on-google/

[marshray]

Thank you for responding. I notice that that page talks primarily about search terms (and in noncommittal terms about how much Google values privacy) and it doesn't seem to apply to the other parts of the expanding portal.

Just to pick one example, where does it say what you do with the data you collect on users when they click a link from YouTube. E.g., the page http://www.youtube.com/user/khanacademy has a link that displays on the page as

    Website: http://www.khanacademy.org

But when you click on it, it actually goes to

    http://www.youtube.com/redirect?q=http%3A%2F%2Fwww.khanacademy.org%2F&session_token=oJd2SDBY1T6kY0eXgYddT3firut8MTMyNzE5MDY5NkAxMzI3MTA0Mjk2

The information on users' link-clicking habits being skimmed from that little trick (and the many others like sourcing script from Google-controlled domains on most sites on the web), is it associated with the G+ identity? Or not? Where is this documented?