Update master workbook

[Kkatt]

I am a beginner in excel.
I have to update a master workbook monthly with new data from a temp workbook. The two workbooks have the same column heading. For now I have to find the blanks manually to fill row by row which is very time consuming.
How do I configure the excel to search for the blanks manually and fill the blanks automatically? Is there any function I can use? Or do I have to write the code manually?

Appreciate your help.

 

[GJSBED]

Is the temp sheet then just an update to what the Master sheet says?
In that on the master sheet there is 'thing 1' and some columns about thing 1 some of which are blank, until the temp sheet adds something new to what is known about 'thing 1'

And that if there are 10 things, we will never ever have an 11th thing?