WhatsApp is free and doesn't include ads, so how does it make any money?
The feature had originally been tested in the US.
The number of people using Facebook actually grew to 2.2 billion.
This is Facebook's latest move to become more transparent.
The MoneySavingExpert founder wants to 'give Facebook a bloody nose'.
He said he would consider new laws to improve the situation.
Want to turn it off? We've got you covered.
Brittany Kaiser claims many more than 87 million users had their data compromised.
'We don’t claim to know what people think or feel.'