Just how much of your personal data is actually online? We take a look

What data do social media companies such as Facebook, Twitter and Google know about you and why does it matter?
It’s a question that’s become more relevant since the revelation that British consulting firm Cambridge Analytica may have mined the information available through social media channels to sway the outcome of the U.S. election in 2016.
The scandal and its fallout are shining a bright spotlight on the data that social media firms have been collecting.
And that should scare pe