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 track management)
- credit memos management
Magento_Sales module is required for Magento_Checkout module to perform checkout operations.
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.
The Magento_Sales module is installed automatically during Magento installation.