VTB_ST3 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 "Screen Structure for Standing Instructions BP Authorization" 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_VTB_ST3 TYPE VTB_ST3.
The VTB_ST3 table consists of various fields, each holding specific information or linking keys about Screen Structure for Standing Instructions BP Authorization data available in SAP. These include MANDT (Client), BUKRS (Company Code), PARTNR (Business Partner Number), RANTYP (Contract Type)... 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. .