Centered on Civil Liberties & Political Issues, Human Development & Socioeconomic Matters
“We collect information to provide better services to all of our users – from figuring out basic stuff like which language you speak, to more complex things like which ads you’ll find most useful or the people who matter most to you online. We collect information in two ways:
Information you give us. For example, many of our services require you to sign up for a Google Account. When you do, we’ll ask for personal information, like your name, email address, telephone number or credit card. If you want to take full advantage of the sharing features we offer, we might also ask you to create a publicly visible Google Profile, which may include your name and photo.
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:
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.
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 lang…”
You can read more about it at http://www.google.com/intl/en/policies/privacy/
I recommend the adjustment of “Web History” in the “Account Settings” (not in the Setting) .