how does it help my print business?
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this solution will make your company run more efficiently and profitably by streamlining your business processes, maximizing your resources and eliminating redundant operations.
300 dpi (dots per inch) is the resolution of the output pdf file. 
as an example; if the print size is a4, then final artwork (f/a) must have the same size (a4 canvas size), with a resolution of 300 dpi