However, this year, Facebook started sharing and collecting those WhatsApp phone numbers nonetheless.
Coming back to Facebook.
It is an open secret that the social web link giant knows more about you than you think.
ProPublicas reporters have spent a year investigating algorithms like those used by Facebook.
When they browse the Web, Facebook collects information about pages they visit that contain Facebook sharing buttons.
Facebook uses all this data to offer marketers a chance to target ads to increasingly specific groups of people.
source: www.techworm.net
