AD01FLOWREP03 is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Document Flow Reporting: Individual Flow" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_AD01FLOWREP03 TYPE AD01FLOWREP03.
The AD01FLOWREP03 table consists of various fields, each holding specific information or linking keys about Document Flow Reporting: Individual Flow data available in SAP. These include DLINR (Number of the Dynamic Item), VBELN (Sales Document), VBPOS (Sales Document Item), IN_WTGBTR (Amount referenced for invoicing)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .