SAP SD (Sales and Distribution) is a key module within the SAP ERP system that manages the entire sales and distribution process of an organization. It covers a wide range of functions, including:

1. **Sales Order Processing**: Creating and managing sales orders, quotations, and contracts.

2. **Pricing**: Handling pricing procedures, discounts, and taxes.

3. **Delivery and Shipping**: Managing the logistics of delivering goods to customers, including shipping and transportation.

4. **Billing**: Generating invoices and managing accounts receivable.

5. **Credit Management**: Assessing customer creditworthiness and managing credit limits.

6. **Reporting**: Providing insights into sales performance and distribution activities.

SAP SD helps businesses streamline their sales processes, improve customer service, and enhance overall efficiency in managing sales and distribution operations.