please paraphrase the following passage with different wordsThe notion of metadiscourse was proposed by Zelling Harris in 1959 which served as an approach of comprehending language in use revealing wr

In 1959, Zelling Harris introduced the concept of "metadiscourse" as a method of understanding language usage. Metadiscourse highlights the writer's or speaker's effort to steer the reader's or listener's understanding of a text. Following this, scholars have been intrigued by metadiscourse and have suggested various methods of categorizing it, such as Crismore in 1993, Hyland in 2005a, and Kopple in 1985.