Facebook Pay supports most major credit and debit cards as well as PayPal.
The social media giant said Facebook Pay is built on existing financial infrastructure and partnerships, and is separate from the Calibra wallet which will run on the Libra network, the company's digital currency.
You can start using Facebook Pay on Facebook or Messenger with just a few taps.
Go to "Settings," then "Facebook Pay" on the Facebook app or website, add a payment method and the next time you make a payment, use Facebook Pay.
Once Facebook Pay is available on WhatsApp and Instagram, you'll be able to set it up directly within each app.
Facebook said it has processed more than $2 billion in donations alone since it launched first fundraising tools in 2015.
"With Facebook Pay, we're continuing to invest in security. We designed Facebook Pay to securely store and encrypt your card and bank account numbers, perform anti-fraud monitoring on our systems to detect unauthorized activity and provide notifications for account activity,a said Liu.
The users can add a PIN or use device biometrics, such as touch or face ID recognition, for an extra layer of security when sending money or making a payment.
In India, Facebook is aiming to launch WhatsApp Pay, a peer-to-peer payment system.
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