If you want your customers can purchase products via a mobile application, then you need this module.
To activate it you just need to click on it.
If you want to add your shipping method you need:
If you want to add your payment method you need:
To delete the added method of delivery / payment, just click on the urn icon next to the desired method.
Also, you can remove the display in the application of an unnecessary method of delivery / payment by removing the checkmark next to "Is it available in the app?". But keep in mind that at least one way of delivery / payment should be included.
If you do not need such functionality, then you can disable the Shopping cart module by clicking on it again.
A message will appear, indicating whether you are sure you want to disable the Shopping cart module. And accordingly you