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"Depending on the products you're using and settings you choose, Google may use different types of location information to help make some services and products you use more helpful. These include: GPS and other sensor data from your device; IP address; Activity on Google services, such as from your searches or places you label like home or work; Information about things near your device, such as Wi-Fi access points, cell towers, and Bluetooth-enabled devices."

Google collects location data through multiple methods including GPS, IP address, WiFi access points, cell towers, and Bluetooth-enabled devices, enabling pervasive location tracking across contexts.

"The information we collect includes unique identifiers, browser type and settings, device type and settings, operating system, mobile network information including carrier name and phone number, and application version number. If you're using an Android device with Google apps, your device periodically contacts Google servers to provide information about your device and connection to our services. This information includes things like your device type and carrier name, crash reports, which apps you've installed."

Google collects a broad range of device data including installed apps, carrier information, phone number, sensor data, and unique identifiers, much of which goes beyond what is needed for core service functionality.

"We may use the information we collect across our services and across your devices for the purposes described above. For example, depending on your available settings, if you watch videos of guitar players on YouTube, you might see an ad for guitar lessons on a site that uses our ad products. Depending on your account settings, your activity on other sites and apps may be associated with your personal information in order to improve Google's services and the ads delivered by Google."

Google explicitly links user activity across its entire ecosystem of services and devices, as well as third-party sites and apps that use Google services, creating a comprehensive cross-service profile.

"We provide personal information to our affiliates and other trusted businesses or persons to process it for us, based on our instructions and in compliance with our Privacy Policy and any other appropriate confidentiality and security measures. We also allow specific partners to collect information from your browser or device for advertising and measurement purposes using their own cookies or similar technologies."

Google shares personal information with affiliates and service providers, and allows advertising partners to directly collect data from user devices via cookies and similar technologies.

"We keep some data until you delete your Google Account, such as information about how often you use our services. And some data we retain for longer periods of time when necessary for legitimate business or legal purposes, such as security, fraud and abuse prevention, or financial record-keeping. When you delete data, we follow a deletion process to make sure that your data is safely and completely removed from our servers or retained only in anonymized form. Because of this, there may be delays between when you delete something and when copies are deleted from our active and backup systems."

Google retains some categories of data for the entire lifetime of an account and beyond, with vague justifications like 'legitimate business purposes,' and acknowledges delays in actually deleting data from backup systems.

"We change this Privacy Policy from time to time. We will not reduce your rights under this Privacy Policy without your explicit consent. We always indicate the date the last changes were published and we offer access to archived versions for your review. If changes are significant, we'll provide a more prominent notice (including, for certain services, email notification of Privacy Policy changes)."

While Google commits to not reducing rights without consent, they can still make other changes to the policy at any time with only a notice, and continued use constitutes acceptance of non-rights-reducing changes.