IMPT_USR1 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 "Structure for User Exit for Measuring Point" 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_IMPT_USR1 TYPE IMPT_USR1.
The IMPT_USR1 table consists of various fields, each holding specific information or linking keys about Structure for User Exit for Measuring Point data available in SAP. These include PSORT (Position Number of the Object Measuring Point (Sort Field)), PTTXT (Description of Measuring Point)... 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. .