Google updated their privacy policy to all Google “services” on the Data Privacy Day 2009 to address the collection of personal information when users interact with various Google products, services and websites. Here’s an excerpt:

When you access Google services, our servers automatically record information that your browser sends whenever you visit a website. These server logs may include information such as your web request, Internet Protocol address, browser type, browser language, the date and time of your request and one or more cookies that may uniquely identify your browser. Also, in order to protect you from fraud, phishing, and other misconduct, we may collect information about your interaction with our services. Any such information we collect will only be used to detect and prevent fraud or other misconduct.

Source:→ SEJ