According to Ecommerce Platforms , a payment gateway is:
“Software that facilitates a transaction by communicating transaction information and in this sense of the word applies to the equivalent of a physical point of sale found in retail outlets.”
In short, it is an intermediary that allows a user to pay within an online store.
When choosing a payment gateway, it's important to consider its buy phone number list security and support, the cost of integrating the gateway, whether it allows payments via a mobile device, the cost per transaction, which is represented by a sales fee, an anti-fraud system, and good 24/7 support. The most recognized payment gateways in Latin America are: PayU, MercadoPago, PayPal, 2Checkout, Redsys, among others.
Another way to pay is by credit or debit card using systems such as PSE (Secure Online Payments).