Types of speeches and presentations based on purpose, delivery, formality, and audiences

One way of categorizing a speech is to examine its purpose. There are informative speeches and persuasive speeches
An informative speech is also called an expository speech, and its purpose is to provide information by describing, for example, an object, an event, a concept, or a process. A persuasive speech is delivered to change thoughts or behaviors regarding facts, policies, or principles. Some speeches are delivered for other purposes, for example, on special occasions such as graduations or weddings. A second way to categorize a speech is to analyze the way the speaker delivers the speech. Some speakers read word-for-word from their manuscripts. Some have memorized their manuscripts. Some use notes or an outline. You will not miss a word if you read word-for-word from a manuscript, but the risk is that your speech turns into a boring lecture. You can focus on the audience if you have memorized your manuscript, but the downside is that you might forget something and get stressed out. I always use notes or an outline, and the benefit of this extemporaneous or casual delivery is that it is a good mix between the two previous types of reading word-for-word and having everything memorized. A third way to categorize a speech is to look at the levels of formality. Some speeches are formal in style, for example, at ceremonies, funerals, etc. Other speeches are more casual, for example, at dinner parties, where the speaker knows the audience and is close to them.
The fourth and last way to categorize a speech is to look at the types of audiences.
Some audiences are friendly, eager to learn, and already on the speaker’s side.
Some audiences are neutral.
And some audiences are uninterested.
You need to describe solutions to problems that will benefit and help your audience if facing a skeptical audience.

Copyright
Text, video, and audio © Kent Löfgren, Sweden