What is postscript definition and examples of postscript

A postscript may be used to add a personal comment or to emphasize an important point in the body of the letter. It should not be used to add an important point that has been mistakenly omitted from the letter. It should not be used to add an important point that has been mistakenly omitted from the letter. The postscript is usually the last thing on any letter and may be preceded by P.s or nothing at all.

When the letters Ps are used they are followed by a period, or a colon. Since postscripts usually indicate poor planning, generally avoid them. However, they are common in sales letters as a punch line to remind readers of a benefit for taking advantage of the offer.