This document provides an overview of SAP Sales and Distribution (SD) module. It describes the key reasons for implementing an ERP system like SAP, highlights SAP's large market share in the ERP industry, and gives an introduction to the various SD documents, functions, and configuration settings. These include documents like sales orders, deliveries, and invoices, as well as functions for pricing, partner determination, and credit management. The document also touches on topics like variant configuration, integration with other modules, and real-time scenarios.