The document provides step-by-step instructions for using the Legacy System Migration Workbench (LSMW) in SAP to migrate legacy data, such as vendor, customer, and asset master data, to SAP. It describes 15 steps for recording an LSMW project to upload general ledger account master data from an Excel file as an example, including maintaining the LSMW object, structure, fields, and file mappings and running the conversion, batch input session, and verification. The instructions are intended to help functional consultants learn LSMW for completing data migration tasks.