what is ps

PS is an abbreviation for "postscript". It is used to add extra information at the end of a letter or message that doesnt relate to the main topic. The term comes from the Latin "post scriptum," which means "written after". In letter and email writing, PS is used to add additional information at the end of a message after the signature. It is also used colloquially when people want to share an afterthought in conversations. Sometimes, when additional points are made after the first postscript, abbreviations such as P.P.S. (post-post-scriptum) and P.P.P.S. (post-post-post-scriptum) and so on are added, ad infinitum.