Business Insider reports on Google’s updating of its privacy policies.
Google scans your email:
Our automated systems analyze your content (including emails) to provide you personally relevant product features, such as customized search results, tailored advertising, and spam and malware detection. This analysis occurs as the content is sent, received, and when it is stored.
Google can reuse whatever you upload:
When you upload,or otherwise submit, store, send or receive content to or through our Services, you give Google (and those we work with) a worldwide license to use, host, store, reproduce, modify, create derivative works (such as those resulting from translations, adaptations or other changes we make so that your content works better with our Services), communicate, publish, publicly perform, publicly display and distribute such content.
Of course, on the surface, it is just a way for Google to ensure that they have permission to scan your emails for virus and data about you. Data that is used to customise your search results and ads targeting. And to translate your uploads, assuming these are content that can be accessed by people who will need it to be translated in the first place.
It is better to be vague than specific in this case to ensure that it blankets all possible instances where the policy can be effected. However, it is worrying for Google to have a policy that gives it so much leeway in what it can do with user data.