RTF (an acronym for Rich Text Format) is a format used for representing common text files that support rich text. This format was developed by Microsoft particularly to support cross-platform file interchange.
Unlike basic text files, RTF ones feature text formatting, such as bold, italics and underlining, as well as a wide range of font types and sizes, and colored lettering.
Therefore, users save their documents as RTF files whenever they want to maintain the original formatting and spacing.
Also, one will also have the possibility to simply convert their documents from a certain format to RTF.