What is the primary purpose of a payment gateway in e-commerce?Group of answer choicesTo authenticate usersTo optimize website loading speedTo facilitate the transfer of funds between buyers and sellersTo encrypt sensitive information

The primary purpose of a payment gateway in e-commerce is to facilitate the transfer of funds between buyers and sellers.

Here's a step-by-step explanation:

1. When a customer places an order from an online store, the payment gateway is the tool that takes the payment details from the customer.

2. The payment gateway then sends this information securely to the merchant's bank.

3. The merchant's bank sends this information to the customer's bank to check if the customer has enough funds to pay for the product.

4. If the customer has enough funds, the transaction is approved and the funds are transferred from the customer's bank to the merchant's bank.

5. The payment gateway then sends a message back to the online store to confirm that the payment has been made.

So, the main role of the payment gateway is to facilitate this transfer of funds from the buyer to the seller.