If you do not select all fields in the field selection for output and have activated the database aggregation, several records may be collected together into a single record. If you select the option 'No. of Hitsoutput', an additional key figure is generated in the output table that specifies how many records the current record is made up of, that is, how many database records have been made into the output record.
You can also use this option to determine how many records there are in a particular selection condition in the InfoCube. Specify a selection condition, but do not select any characteristics or key figures. In the return list, you only get the column return with the number of hits and the number of entries that are relevant for this selection condition.