In this work, many things may go wrong: change of paper for another, new printer with other inks, incorrect conversion of colors.
There are also typo errors, bad placement of some element or just a few details.
All this can end very badly and bring big losses - so it's work under stress and tension, because if something goes wrong it usually will be just for the DTP operator.
But what would the world of marketing and advertising look like if it were not for printing and printing? Today, such things are produced on a mass scale, expenditures are increasing, because demand is growing all the time. Nowadays, there is no company that at least once would not use the services of a printing company - leaflets, business cards or a small banner, it's almost a standard for every company.
From small ones to big ones? it is known that on a different scale.
However, you can still see badly marked or un-promoted brands, the reason for this may be the lack of investment in printing advertising materials.