please paraphrase the following passage with different words and make it longerThe notion of metadiscourse was proposed by Zelling Harris in 1959 which served as an approach of comprehending language

In 1959, Zelling Harris introduced the concept of "metadiscourse" as a means of understanding language in use. Essentially, metadiscourse refers to the ways in which writers or speakers attempt to guide their audience's comprehension of a text. This can include things like providing background information, signaling transitions between ideas, or highlighting important points.

Since Harris's initial proposal, scholars have continued to explore the concept of metadiscourse and have proposed various ways of classifying it. For example, Crismore (1993), Hyland (2005a), and Kopple (1985) have all contributed to the development of this field of study. Despite these various approaches, however, there is still much to be learned about the ways in which metadiscourse functions in different contexts and across different languages.

One potential area of interest for future research could be the role of metadiscourse in online communication. With the rise of social media and other digital platforms, it is becoming increasingly common for people to communicate with each other in written form. In these contexts, metadiscourse may play a particularly important role in helping to convey meaning and facilitate understanding. Additionally, it is possible that the norms surrounding metadiscourse may differ in online spaces compared to more traditional forms of communication, which could have implications for how we teach and study this concept.

Overall, the concept of metadiscourse is a rich and complex one that has the potential to shed light on a wide range of linguistic phenomena. As scholars continue to explore this topic, we can expect to gain a deeper understanding of how language functions in various settings and contexts