RNA processing, which is about any modification made to RNA between its transcription and its final function in the cell, includes the 3 steps: the removal of extra sections of RNA, specific modifications of RNA bases, and modifications of the ends of the RNA.
There are three main types of RNA processing: trimming one or both of the ends of the primary transcript to the mature RNA length; removing internal RNA sequences by a process called RNA splicing; and modifying RNA nucleotides either at the ends of an RNA or within the body of the RNA.