Quick Viewer is a report generating tool in SAP that allows users to create simple reports without any ABAP coding knowledge. It generates basic list reports by connecting database tables, selecting fields, and setting filters. The document provides step-by-step instructions on how to use Quick Viewer, including selecting data sources, joining tables, choosing fields, setting filters and sorts, and various output options. It also compares Quick Viewer to SAP Query and discusses converting QuickViews to SAP Queries and transporting QuickViews between systems.