What mean of the Tmp file.

Tmp file mean (Temporarily)

How make tmp file.

Some software create additional file during working. If these file exist in system or suddenly raise quantity. The risk of that program 
collapse or low efficiency in future. So, should be that clear tmp file from hard disk.

This Trick more useful on window xp. 

Click to Start – find or search the window appear click all file and folder now write (*.tmp ) Enter. The result is that all temporary file disclosed and delete it after select to files.