Payment gateways are a merchant service that processes credit card payments for eCommerce sites and traditional brick-and-mortar stores. After that, the payment gateway transmits the transaction data to the specified payment processor. This activation function is the list of all payment methods.  

Short Direction: {Amazcart> Dashboard> Payment Gateways> Activation> Name> Activate.}

If you want to set up the payment system, first go to the Dashboard to the payment gateway; you will see the list of all payment Activation, Name & the payment activate list to turn on or off anytime. 

1- Payment Gateways

2- Activation

3- Name

4- Activate