As a final step of a retail sale, a Point of Sale which is more commonly known as a POS terminal is a digital solution that establishes a streamlined connection between e-commerce and POS system to process transactions and complete payments.
POS usually handles financial and administrative tasks where customers complete the payment and also provide an electronically generated invoice of the transaction to complete the transaction. POS can also be offline where everything from a cash register to a barcode scanner or card reader can be considered a POS system.
The systems are designed keeping in mind the payment methods that the e-commerce platform wants to provide to the customers and also provide convenience to the customers to make online payments.