Discourse is not a tangible thing, it is a process. While you may not be able to point at something in a text and say “that is discourse” you can point at evidence of a discourse. We see discourse in language and text itself.
The language used in society is evident of a discourse present. For example in Ireland, we use the word ‘wagon’. Our cultural agreement is that this word has two meanings, a literal wagon with wheels etc. This would perhaps be agreed upon in other cultures too. However, if you were to say “You’re a wagon” the discourse is that this word is offensive and insulting. The discourse in Irish society is that “Wagon” is a slang term directed at women.
Discourse can influence how people perceive reality. The power the media has in shaping this discourse is evident in its effects on society. Media Discourse can be found when the receiver of the content, break down the text and analysis the subtext.