MSAM_MO_EXT_META 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 "Metadata for Enhancement Fields" 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_MSAM_MO_EXT_META TYPE MSAM_MO_EXT_META.
The MSAM_MO_EXT_META table consists of various fields, each holding specific information or linking keys about Metadata for Enhancement Fields data available in SAP. These include FIELD_NAME (Component name), DATATYPE (Data Type in ABAP Dictionary), DATALENGTH (Length (No. of Characters)), DECIMALS (Number of Decimal Places)... 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. .