PS stands for Postscript.
Postscript is an abbreviation derived from the Latin term "postscriptum," which translates to "written after." As the Latin origin suggests, a postscript is an addition to a letter or document that is added after the main body has been completed.
In letters and formal documents, PS is used to add extra information, an afterthought, or to emphasize a point after the main body of the text is finished. It offers a way to include something without rewriting the entire message.
