I'm sure some of you have wondered for a few seconds during one day about why Google even bothers with the whole Google+ thing.  I mean, it's not like they're really pushing people to use the damn thing, right?

But now, every time you sign in to YouTube to watch that video that contains the "questionable content"...you know the ones I'm talking about...the good ones...anyway, every time you sign in to watch one of these cool videos, Google uses Plus to track you.

Every time you're signed in and search Google Maps...Plus tracks you.

Every time you get and email on Gmail...Plus tracks you.

Before Google released Plus, the company might not have known that you were the same person when you searched, watched videos and used maps. With a single Plus account, the company can build a database of your affinities.

via The New York Times

Why would they do this?  Money, of course!  They can use these "affinities" to sell to advertisers to make more money off of what you're doing.  How does that sit with you?  Is that okay?  Invasion of privacy?