What information does Google have on us anyway, and how can they/are they using it?

I've recently noticed that some of the ads I see on youtube (where I am logged in via my google name) seem to be based on information culled from things I've written in google docs, which I find a little strange. I know they target ads based on your emails which is already slightly invasive but I've never been sure exactly how much they are culling (my guess: everything). I've heard that google can/does track websites you visit so long as you are logged into google on chrome? Is this true or myth?

I've seen google talked about on these boards here and there, particularly their giant server farms full of this info, but I guess I'd like to hear what the Google public line on this stuff is (my guess: "We collect everything to better serve your webbrowsing experience!") as well as what we suspect they may have.

http://b.vimeocdn.com/ts/155/392/155392420_640.jpg

Remove items from and pause your web history

Google can/does track websites you visit so long as you are logged into Google, regardless of browser.

google history was actually super useful for a while, but i can't get it to work as well anymore. just to endorse their hoarding for a moment. having a record of every time i've visited merriam-webster.com is a pretty good learning aid.

@ fit and working - god, that is terrifying.

yeah it's gotten to the point that sometimes I will just use bing despite the shitty results

Information we get from your use of our services. We may collect information about the services that you use and how you use them, like when you visit a website that uses our advertising services or you view and interact with our ads and content. This information includes:

Device information

We may collect device-specific information (such as your hardware model, operating system version, unique device identifiers, and mobile network information including phone number). Google may associate your device identifiers or phone number with your Google Account.

Log information

When you use our services or view content provided by Google, we may automatically collect and store certain information in server logs. This may include:
details of how you used our service, such as your search queries.
telephony log information like your phone number, calling-party number, forwarding numbers, time and date of calls, duration of calls, SMS routing information and types of calls.
Internet protocol address.
device event information such as crashes, system activity, hardware settings, browser type, browser language, the date and time of your request and referral URL.
cookies that may uniquely identify your browser or your Google Account.

Location information

When you use a location-enabled Google service, we may collect and process information about your actual location, like GPS signals sent by a mobile device. We may also use various technologies to determine location, such as sensor data from your device that may, for example, provide information on nearby Wi-Fi access points and cell towers.

Unique application numbers

Certain services include a unique application number. This number and information about your installation (for example, the operating system type and application version number) may be sent to Google when you install or uninstall that service or when that service periodically contacts our servers, such as for automatic updates.

So, it even tracks phone calls? Like if oyu're using Android or someting as a phone, I guess (which I dont).

Sorry, that text blatted out without formatting. Its from: http://www.google.com/intl/en/policies/privacy/

I have no idea why I am getting ads for:

http://poetv.com/ads/imgs/wolfurine.jpg

Google Adsense must be getting senile.