If you're using Facebook, you're giving the company a ton of information about yourself, which it is selling to advertisers in one form or another.
Facebook is a great utility if you want to stay in touch with friends and family, share photos, and see what other people are up to in their lives.
It's free, of course, but that doesn't mean it comes without a price. If you're using Facebook, you're giving the company a ton of information about yourself which it is selling to advertisers in one form or another.
Most people forget that when they download an app or sign-in to a website using their Facebook login, they're giving those companies a look into their Facebook profiles. Your profile contains a lot of personal information that can often include your email address and phone number, but frequently also your work history and your current location. And most people don't realise that if you're sharing any of that data with your friends then apps used by those friends can see that data too!
Advertisers, Facebook app developers, and Facebook ad tech partners don't get a direct look at your personal data. They won't see that my name is Jim Edwards, my phone number is 07xxxx, I'm male, and I work at Business Insider — Facebook hashes and anonymises all the data to protect user's privacy and gives it back to partners in bulk so they can't identify individuals — but nevertheless, this data is being used in order to serve you better-targeted ads.
Read more: http://uk.businessinsider.com/how-to-block-companies-tracking-you-on-facebook-2014-1?r=US&IR=T#ixzz3icSvC5xh
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