It’s official: Google+ will be connected to everything
Just as Facebook is trying to accumulate data about your activity through an awareness of what you are sharing via its “social apps” and its “frictionless sharing” approach, so Google wants to aggregate as much as it can about you and your interests via all the services it offers — and how you interact with those services and others through Google+. Some of it might come from connecting YouTube with Google+ Hangouts, so you can watch a TV show with others; some might come from connecting your Gmail to Google+, so that profiles of people you follow and your shared interests appear next to emails from them.
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Google aims to integrate Google+ much more with its services, meaning that they will become less private and more aware of your identity. Because who needs privacy anyway, right!?