You may not use the Google search service to sell a product or service, or to increase traffic to your Web site for commercial reasons, such as advertising sales. If you want to make commercial use of the Google search engine, please contact bizdev@google.com for information on Google's services.

Start with a clear subject line: "We're changing our Privacy Policy" or "We're updating our Terms and Conditions" Mention why the update is needed: improved user experience, to give access to new services that requires a new set of rules to be accepted etc. Provide a summary of the major changes.

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.