PayPal is a popular online payment system that allows users to make payments through a variety of channels, including online and in-store. Many online retailers accept PayPal as a form of payment, and users can also use PayPal to pay for goods and services in brick-and-mortar stores.
Some of the most popular PayPal-supported stores include Amazon, eBay, and iTunes. In addition, PayPal allows users to transfer money to other PayPal users and to make payments to other banks and credit unions.