First, to make a good presentation you should research and know about the topic decause if the audience ask you, you have to know the auswers.
Second, you should wear appropinate clothes or formal because it look good for presentation.
Third, have eye contact because it can help you a lot and it means you are concentrating and can give knowledge to everyone.
Then, you should not forget to give the hand outs to your audience because the hand outs can make the audience understad about the topic you talk about.
2). What is a bad presentation like?
Frist, have a lot of items because it can make you worry, the first or that first.
Next, have mono-tone voice as it makes the audience confuse about what you talk.
Then, you beat around the bush it make the audience bored and it takes a long time.