With the popularization and the mass usage of the social media, an interesting thing is happening, and not many people are noticing, is that everyone is putting all their lives on the Web. Every single moment is registered and people don't care where they are putting their own info.
You are a liar if you say that you never entered the same password in differents Social Media app's registrations? Yeah, you're not alone. It is much more simple to have just a few passwords, or even just one. But what not everyone has a nice intention, like Google and could these sites do having your information? Simple, some bad and some good things:
Bad:
Spam - One of the most annoying problems on the Web.
Good:
Recomendation based on Profile analysis
Connect people with the same interests
Nowadays, Google have made people believemore in Web Services, wich is good and bad at the same time, because not everyone is trustful.
Tip: read the Terms of Service before signing in.
