Spoken Text: organisation
Just like written texts, spoken texts are also organised, although a bit differently:
Informal spoken texts such as conversations between friends, some vlogs or other spontaneous situations are usually not prepared, but organised naturally. Speaking here means thinking on the spot. However, you usually start and end a conversation in a certain way, for instance by greeting someone and by saying goodbye.
The organisation of formal spoken texts such as presentations, interviews and speeches are more similar to written texts. They are prepared and therefore usually consist of three parts: an introduction, body and conclusion.