Purpose of module

Magento\Sales module is responsible for order processing and appearance in system, Magento\Sales module manages next system entities and flows:

order management;
invoice management;
shipment management (including tracks management);
credit memos management; Magento\Sales module is required for Magento\Checkout module to perform checkout operations.

Deployment

System requirements

The Magento_Sales module does not have any specific system requirements. Depending on how many orders are being placed, there might be consideration for the database size

Install

The Magento_Sales module is installed automatically (using the native Magento install mechanism) without any additional actions.