SOURCE: The Independent
The change enables it to gather data from activity across the internet, as well as the normal data it gathers on information you and your friends have added to the site. It also allows the site to pass on that information with its other branches, including Instagram.
Facebook does not share data with WhatsApp or vice versa, the company said.
The company said in November that the change would come into effect, when it mentioned that it would be implemented on January 30. Facebook says that it showed notifications to users, and sent them emails, informing them that the change was coming into effect.