purpose
The reason you are speaking: to inform, explain, persuade, entertain or describe.
audience
The people who are listening to you.
paraphrase
To say someone else's idea in your own words, keeping the same meaning.
restate
To say your main idea again, often in a slightly different way, to make it clear.
coherent
Clear and easy to follow, with ideas that are in a sensible order and connect to each other.
formal
A careful, more serious way of speaking, for things like presentations or speaking to a principal or guest.